| ◆ |
T. Sogabe, S.-L. Zhang, GPBi-CG revisited: a hybrid of the CGS method and the GPBi-CG method for nonsymmetric linear systems, 9th European Congress on Computational Methods in Applied Sciences and Engineering, the Lisbon Congress Centre, Lisboa, Portugal, June 3-7, 2024. |
| ◆ |
[Invited Talk (MS)]
T. Sogabe, F. Tatsuoka, S. Takahira, Numerical and quantum algorithms for matrix functions based on some quadrature formulas, SIAM Conference on Applied Linear Algebra (LA24), Sorbonne University, Paris, France, May 13-17, 2024. |
| ◆ |
[Invited Talk]
T. Sogabe and A. Ohashi Numerical Algorithms for Computing Singular Values of a Generalized Tensor Sum, The 14th International Conference on Numerical Optimization and Numerical Linear Algebra, Taiyuan, Shanxi, China, August 15-18, 2023. |
| ◆ |
[Invited Talk]
T. Sogabe and F. Tatsuoka, Recent Developments in Computing Matrix Functions With The Double Exponential Formulas, IV International Conference on Mathematics and its Applications in Science and Engineering, U-Tad, Madrid, Spain, July 12-14, 2023. |
| ◆ |
[Invited Talk]
T. Sogabe and A. Ohashi, Computation of singular values for generalized tensor sum, The 40th JSST Annual International Conference on Simulation Technology, Doshisha University, Kyoto, Japan, Sep. 1-3, 2021 (Online). |
| ◆ |
F. Tatsuoka, T. Sogabe, Y. Miyatake, T. Kemmochi, S.-L. Zhang Computing the matrix fractional power based on the double exponential formula SIAM Conference on Applied Linear Algebra (SIAM LA21), May 17-21 2021. |
| ◆ |
A. Ohashi and T. Sogabe, On computing an arbitrary singular value of a tensor sum, International Conference on Mathematics and its Applications in Science and Engineering (ICMASE2020), Ankara Haci Bayram Veli University, Ankara, Turkey, July 9-10, 2020 (Online). |
| ◆ |
Y. Satake, T. Sogabe, T. Kemmochi, and S.-L. Zhang, On the *-congruence Sylvester equation, International Conference on Mathematics and its Applications in Science and Engineering (ICMASE2020), Ankara Haci Bayram Veli University, Ankara, Turkey, July 9-10, 2020 (Online). |
| ◆ |
[Invited Talk]
T. Sogabe, M. Oozawa, Y. Miyatake, and S.-L. Zhang, Relation between T-congruence Sylvester equation and Lyapunov equation, Conference on Mathematical, Physical and Intelligent Sciences 2019, Dalian University of Technology, Panjin, China, June 26-30, 2019. |
| ◆ |
F. Tatsuoka, T. Sogabe, Y. Miyatake, and S.-L. Zhang, On an interval truncation method of the double exponential formula for the matrix logarithm, SIAM East Asian Section Conference 2019, Wuhan University, Wuhan, China, Jun. 13-16, 2019. |
| ◆ |
S. Takahira, A. Ohashi, T. Sogabe, and T. S. Usuda, Quantum algorithm for matrix functions by Cauchy's integral formula, 18th Asian Quantum Information Science Conference (AQIS2018), Nagoya, Extended Abstracts of AQIS2018, 213, Sept. 8-12, 2018. |
| ◆ |
[Invited Talk]
T. Sogabe, D. Lee, and S.-L. Zhang, Recent progress on numerical algorithms for large eigenvalue problems, The Workshop on Computational Methods for Eigenvalue Problems, Jilin University, China, Aug. 13-17, 2018. |
| ◆ |
F. Tatsuoka, T. Sogabe, Y. Miyatake, and S.-L. Zhang, Computation of the matrix logarithm using the double exponential formula, Numerical Analysis and Scientific Computation with Applications (NASCA2018), Kalamata, Greece, July 2-6, 2018. |
| ◆ |
F. Tatsuoka, T. Sogabe, Y. Miyatake, and S.-L. Zhang, Computation of the matrix fractional power based on the double exponential formula, SIAM East Asian Section Conference 2018, The University of Tokyo, Tokyo, Japan, June 22-25, 2018. |
| ◆ |
D. Lee, T. Hoshi, T. Sogabe, Y.Miyatake, and S.-L. Zhang, Solving the k-th eigenvalue problem in large-scale electronic structure Calculations, 18th SIAM Conference on Parallel Processing for Scientific Computing, Waseda University, Tokyo, Japan, Mar. 7-10, 2018. |
| ◆ |
K. Yoshimi, M. Kawamura, Y. Yamaji, T. Sogabe, and T. Hoshi, Open-source software development that bridges the gap between numerical analysis and material simulation on supercomputers, 18th SIAM Conference on Parallel Processing for Scientific Computing, Waseda University, Tokyo, Japan, Mar. 7-10, 2018. |
| ◆ |
S. Takahira, A. Ohashi, T. Sogabe, and T. S. Usuda, Amplitude estimation based algorithm for circulant linear systems, 17th Asian Quantum Information Science Conference (AQIS2017), Singapore, Proceedings of AQIS2017, pp. 279-281, Sept. 4-8, 2017. |
| ◆ |
Y. Miyatake, T. Sogabe, S.-L. Zhang, On the equivalence between the SOR-type methods and the Itoh?Abe discrete gradient methods, SIAM: East Asian Section Conference 2017, Seoul, South Korea, June 21-25, 2017. |
| ◆ |
D. Lee, T. Hoshi, Y. Miyatake, T. Sogabe, and S.-L. Zhang, An eigenvalue problem in electronic structure calculations and its solution by spectrum slicing, SIAM: East Asian Section Conference 2017, Seoul, South Korea, June 21-25, 2017. |
| ◆ |
A fast and stable Incremental Newton iteration for the matrix pth root, F. Tatsuoka, T. Sogabe, Y. Miyatake, and S.-L. Zhang, SIAM: East Asian Section Conference 2017, Seoul, South Korea, June 21-25, 2017. |
| ◆ |
(Requested to give a talk)
Y. Miyatake, T. Sogabe, S.-L. Zhang, Iterative solvers based on the discrete gradient method for symmetric positive definite linear systems, 19h International Conference on Finite Elements in Flow Problems - FEF 2017, Rome, Italy, April 5-7, 2017. |
| ◆ |
S. Takahira, A. Ohashi, T. Sogabe, and T. S. Usuda, Quantum algorithm for linear equations with a circulant matrix, 16th Asian Quantum Information Science Conference (AQIS'16), Taipei, Taiwan, Aug. 28 - Sept. 2, 2016. |
| ◆ |
D. Lee, T. Hoshi, Y. Miyatake, T. Sogabe, and S.-L. Zhang, A bisection approach combined with a projection method for interior eigen-value problems in materials science, SIAM: East Asian Section Conference 2016 (EASIAM2016), Macau, China, Jun. 20-22, 2016. |
| ◆ |
[Plenary Talk] T. Sogabe and S.-L. Zhang, A block Krylov subspace method for shifted linear systems with complex symmetric matrices, International Conference on Information and Computational Science (ICICS2016), Dalian University of Technology, Dalian, China, Aug. 2-6, 2016. |
| ◆ |
[Invited Talk] T. Sogabe, Krylov subspace methods for complex symmetric linear systems, Workshop on Numerical Algebra, Algorithms, and Analysis, National Institute of Informatics, Tokyo, Japan, Jan. 11-12, 2016. |
| ◆ |
[Invited Talk] T. Sogabe and S.-L. Zhang, A block variant of the COCG method for generalized shifted linear systems with multiple right-hand sides, 13th U.S. National Congress on Computational Mechanics (USNCCM13), Manchester Grand Hyatt, San Diego, CA., USA, July 26-30, 2015. |
| ◆ |
S. Takahira, A. Ohashi, T. Sogabe, and T. S. Usuda, Quantum-classical hybrid algorithm to solve linear equations for k-tridiagonal matrix, 15th Asian Quantum Information Science Conference (AQIS2015), Proceedings of AQIS2015, pp. 154-155, Aug. 2015. |
| ◆ |
M. Tanaka, A. Ohashi, T. Sogabe, and T. S. Usuda, Derivation of analytical expression of channel matrix for coded 4PSK signals using tensor product decomposition of Gram matrix, 15th Asian Quantum Information Science Conference (AQIS2015), Korea, Proceedings of AQIS2015, pp. 143-144, Aug. 2015. |
| ◆ |
S. Mizuno, Y. Moriizumi, T. S. Usuda, and T. Sogabe, On an initial guess of Newton's method for the matrix square root based on a sphere constrained optimization problem, International Workshop on Information Technology, Applied Mathematics and Science, Kyoto, Japan, Feb., 2015. |
| ◆ |
T. S. Usuda, T. Sogabe, and K. Shiromoto, Formula of channel matrix for covariant signal set with respect to a direct product of groups, 12th International Conference on Quantum Communication, Measurement and Computing (QCMC2014), Hefei, China, Nov. 2014. |
| ◆ |
M. Tanaka, T. Sogabe, K. Shiromoto, and T. S. Usuda, Group covariance and formula of channel matrix of coded 4PSK signals by linear codes over F4, 2014 International Symposium on Information Theory and Its Applications (ISITA2014), Melbourne, Australia, Oct. 2014. |
| ◆ |
[Invited Talk]
A. Ohashi and T. Sogabe, An algorithm for computing extremal singular values of a generalized tensor sum, Structured Numerical Linear and Multilinear Algebra: Analysis, Algorithms and Applications (SLA2014), Kalamata, Greece, September 8-12, 2014, |
| ◆ |
T. Sogabe and S.-L. Zhang, “An iterative method for solving complex symmetric generalized shifted linear systems with multiple right-hand sides”, The 4th International Conference on Matrix Analysis and Applications, Dedeman Hotel, Konya, Turky, July 2-5, 2013. |
| ◆ |
T. Hoshi, T. Sogabe, S.-L. Zhang, and H. Imachi, Krylov subspace theories and one-hundred-million-atom quantum material simulations on the K computer, International Workshop on Eigenvalue Problems: Algorithms; Software and Applications, in Petascale Computing (EPASA2014) Tsukuba International Congress Center EPOCHAL TSUKUBA,Tsukuba-city,Japan, March 7-9, 2014. (poster) |
| ◆ |
T. Sogabe and S.-L. Zhang, “An iterative method for solving complex symmetric generalized shifted linear systems with multiple right-hand sides”, The 4th International Conference on Matrix Analysis and Applications, Dedeman Hotel, Konya, Turky, July 2-5, 2013. |
| ◆ |
A. Ohashi and T. Sogabe “On computing maximum/minimum singular values of a generalized tensor sum”, Numerical Analysis and Scientific Computation with Applications (NASCA13) , Universite du Littoral Cote d'Opale, Calais, France, June 24-26, 2013. |
| ◆ |
D. Lee, T.Miyata, T. Sogabe, T. Hoshi, and S.-L. Zhang, “A numerical approach to obtaining intermediate eigenvalues in electronic structure calculations”, International Symposium on Computics: Quantum Simulation and Design (ISC-QSD), Osaka University Hall, Oct. 11-13, 2012. (poster) |
| ◆ |
T. Sogabe, T. Hoshi, S.-L. Zhang, T. Fujiwara, “Krylov subspace methods for generalized shifted linear systems arising in large-scale electronic structure calculation”, International Symposium on Computics: Quantum Simulation and Design (ISC-QSD), Osaka University Hall, Oct. 11-13, 2012. |
| ◆ |
[Invited Talk]
T. Hoshi, S. Yamamoto, T. Fujiwara, T. Sogabe, S-L. Zhang, Y. Akiyama, T. Ohno, “Ten-million-atom electronic structure calculations with novel linear-algebraic algorithm and the K computer”, International Symposium on Computics: Quantum Simulation and Design (ISC-QSD), Osaka University Hall, Oct. 11-13, 2012. |
| ◆ |
[Invited Talk]
T. Sogabe, T. Hoshi, S.-L. Zhang and T. Fujiwara, “Numerical methods for generalized shifted linear systems with complex symmetric matrices,” 4th China-Japan-Korea Conference on Numerical Mathematics, Otsu City, Shiga Prefecture, Japan, August 25-28, 2012. |
| ◆ |
T. Miyata, T. Sogabe, and S.-L. Zhang, “Jacobi-Davidson Type Methods Using a Shift Invariance Property of Krylov Subspaces for Eigenvalue Problems”, SIAM Conference on Applied Linear Algebra, Valencia, Spain, June 18, 2012. |
| ◆ |
[Invited Talk]
T. Sogabe, T. Hoshi, S.-L. Zhang and T. Fujiwara, “Krylov subspace methods for solving generalized shifted linear systems”, International Workshop on Computational Science and Numerical Analysis, The University of Electro-Communications, Tokyo, Japan, March 24-26, 2012. |
| ◆ |
[Invited Talk]
T. Hoshi, T. Sogabe, S. Yamamoto, S. Nishino, T. Fujiwara, S.-L. Zhang and Y. Yamamoto, “Novel linear-algebraic theories in large-scale electronic structure calculation and its application to nano-materials”, Dresden-Kobe Joint Workshop on Electronic Simulations for Nanosystems, Kobe University, Japan, March 7, 2012. |
| ◆ |
L. Du, T. Sogabe, S.-L. Zhang, “A variant of the IDR(s) method with quasi-minimal residual strategy”, The 7th East Asia SIAM Conference & RIMS Workshop on Methods in Industrial and Applied Mathematics, Waseda University Kitakyushu Campus, Japan, June 27-29, 2011. |
| ◆ |
T. Miyata, L. Du, T. Sogabe, Y. Yamamoto, S.-L. Zhang, “A projection approach to complex eigenvalues of a specified absolute value”, The 7th East Asia SIAM Conference & RIMS Workshop on Methods in Industrial and Applied Mathematics, Waseda University Kitakyushu Campus, Japan, June 27-29, 2011. |
| ◆ |
T. Hoshi, T. Fujiwara, Y. Zempo, M. Ishida, S. Yamamoto, S. Nishino, T. Sogabe, S.-L. Zhang, “Large scale electronic structure calculations with ELSES”, IPsi-k Conference 2010, Berlin, Germany, September 12-16, 2010. |
| ◆ |
T. Sogabe, A. Suzuki, and S.-L. Zhang, “On a cost-efficient iteration of Ye’s hybrid method for minimizing a quadratic function over a sphere constraint”, 2nd IMA Conference on Numerical Linear Algebra and Optimisation, p.16, University of Birmingham, UK, Sep. 13-15, 2010. |
| ◆ |
[Invited Talk]
S.-L. Zhang, A. Imakura, and T. Sogabe, “GMRES(m) Method with Look-Back-type Restart for Solving Nonsymmetric Linear Systems”, The 7th International Conference on Scientific Computing and Application, Dalian, China, June 13-16, 2010. |
| ◆ |
[Invited Talk]
A. Imakura, T. Sogabe, and S.-L. Zhang “A Look-Back Technique of Restart for the GMRES(m) Method”, Applied Linear Algebra - in honor of Hans Schneider, University of Novi Sad, Novi Sad, Serbia, May 24-28, 2010. |
| ◆ |
T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara, “A fast iterative method for solving generalized shifted linear systems with complex symmetric matrices” International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.11, Tokyo, Japan, Dec. 7-9, 2009. |
| ◆ |
T. Hoshi, S. Yamamoto, T. Sogabe,
S.-L. Zhang, S. Nishino, H. Teng, and T. Fujiwara, “Large-scale electronic structure calculations and nanomaterial process” International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.14, Tokyo, Japan, Dec. 7-9, 2009. |
| ◆ |
T. Miyata, L. Du, T. Sogabe, Y. Yamamoto, and S.-L. Zhang, “A numerical algorithm for eigenvalue problems of photonic crystals”, International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.47, Tokyo, Japan, Dec. 7-9, 2009. (Poster) |
| ◆ |
L. Du, T. Sogabe, and S.-L. Zhang, “A block IDR(s) method for nonsymmetric linear systems with multiple right-hand sides”, International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.48, Tokyo, Japan, Dec. 7-9, 2009. (Poster) |
| ◆ |
A. Imakura, T. Sogabe, and S.-L. Zhang, “A study on the restart of the GMRES(m) method for solving nonsymmetric linear systems”, International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.50, Tokyo, Japan, Dec. 7-9, 2009. (Poster) |
| ◆ |
S. Suzuki, T. Sogabe, and S.-L. Zhang, “An efficient method for minimizing a quadratic function with a sphere constraint”, International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.51, Tokyo, Japan, Dec. 7-9, 2009. (Poster) |
| ◆ |
H. Teng, T. Hoshi, S. Yamamoto, T. Sogabe, S.-L. Zhang, and T. Fujiwara, “Generalized-shifted COCG method and behavior of residual error in large-scale electronic structure calculations”, International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.52, Tokyo, Japan, Dec. 7-9, 2009. (Poster) |
| ◆ |
S. Yamamoto, T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara, “Shifted COCG method and its application to multi-orbital extended Hubbard model”, International Symposium of Electronic Structure Calculations -Theory, Correlated and Large Scale Systems and Numerical Methods-, p.53, Tokyo, Japan, Dec. 7-9, 2009. (Poster) |
| ◆ |
[Invited Talk]
T. Fujiwara, S. Yamamoto, T. Hoshi, T. Sogabe, S.-L. Zhang, M. Ikeda, M. Nakashima, T.Mizuno, N. Watanabe, S. Nishino, Large-scale electronic structure calculation theory and applications The 3rd Theory Meets Industry International Workshop, Nagoya, Japan, Nov. 11-13, 2009. |
| ◆ |
A. Imakura, T. Sogabe, and S.-L. Zhang, “A look-back strategy for the GMRES(m) method”, The 7th International Conference on Numerical Optimization and Numerical Linear Algebra, p. 31, Lijiang, Yunnan, China, Aug. 16-19, 2009. |
| ◆ |
T. Miyata, L. Du, T. Sogabe, Y. Yamamoto, and S.-L. Zhang, “Computation of eigenvalues in multiply connected region”, The 7th International Conference on Numerical Optimization and Numerical Linear Algebra, p. 38, Lijiang, Yunnan, China, Aug. 16-19, 2009. |
| ◆ |
T. Sogabe and S.-L. Zhang, “A fast solver for generalized shifted linear systems with complex symmetric matrices”, The 7th International Conference on Numerical Optimization and Numerical Linear Algebra, P. 41, Lijiang, Yunnan, China, Aug. 16-19, 2009. |
| ◆ |
S.-L. Zhang, A. Imakura, and T. Sogabe, “A New Variant of the GMRES(m) Method for Solving Nonsymmetric Linear Systems”, The 2nd International Conference in Mathematical Modelling and Computation and The 5th East Asia SIAM Conference, P.52, Universiti Brunei Darussalam, Brunei, June 8-11, 2009. |
| ◆ |
T. Sogabe and S.-L. Zhang, “An approach to fast solution of generalized shifted linear systems with complex symmetric matrices”, Numerical Analysis and Scientific Computing with Applications (NASCA2009), p. 82, Agadir, Morocco, May 18-22, 2009. |
| ◆ |
A. Imakura, T. Sogabe, and S.-L. Zhang, “An efficient variant of the GMRES(m) method based on error equations”, Numerical Analysis and Scientific Computing with Applications (NASCA2009), p. 52, Agadir, Morocco, May 18-22, 2009. |
| ◆ |
T. Hoshi, S. Yamamoto, T. Sogabe, S.-L. Zhang and T. Fujiwara, “Novel algorithms for large-scale shifted linear equations based on Krylov subspace theory ”, Supercomputing in Solid State Physics , ISSP, Univ. of Tokyo, Feb. 16-19, 2009. (Poster) |
| ◆ |
[Invited Talk]
S.-L. Zhang and T. Sogabe, “Numerical Algorithms for Solving Shifted Complex Symmetric Linear Systems”, The NIMS 2008 Conference & The 4th East Asia SIAM Conference, Daejeon, Korea, Oct. 10-12, 2008. |
| ◆ |
S. Yamamoto, T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara “Extra large size linear problem solver and its application to the excitation spectra in the many-electron problem”, International Conference on Quantum Simulators and Design 2008, Tokyo, Japan, May 31-Jun. 3, 2008. (Poster presentation) |
| ◆ |
[Winner among young researchers]
A. Imakura, T. Sogabe, and S.-L. Zhang, “Implicit wavelet sparse approximate inverse preconditioner using blocked finger pattern for nonsymmetric linear systems”, ALA 2008 Applied Linear Algebra-in honor of Ivo Marek, Novi Sad, Serbia, Apr. 28-30, 2008. |
| ◆ |
[Invited Talk]
T. Hoshi, T. Sogabe, S.-L. Zhang, S. Yamamoto, H. Nitta, N. Watanabe,
Y. Zempo and T. Fujiwara, “Novel linear-algebraic algorithm and large-scale electronic structure calculation”, 2008 International Workshop on Riken-Harvard GPGPU Symposium 2008, Harvard University, USA, Mar. 10-11, 2008. |
| ◆ |
[Invited Talk]
T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara, “A numerical approach to the computation of Green's function in large-scale electronic structure theory”, 2008 International Workshop on Numerical Verification and its Applications (INVA2008), Okinawa, Japan, May 1-7, 2008 |
| ◆ |
[Invited Talk]
T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara, “On an application of the QMR method to complex symmetric shifted linear systems”, International Workshop on Large-scale Matrix Computation and Applications in Physics and Engineering Science, Tokyo, Japan, Dec. 13, 2007. |
| ◆ |
[Invited Talk]
T. Sogabe and S.-L. Zhang, “Recent development of Krylov subspace methods for the solution of complex symmetric shifted linear systems”, International Conference on Numerical Optimization and Numerical Linear Algebra, p. 7, Urumqi, XinJiang, China, Sep. 8-11, 2007. |
| ◆ |
T. Sogabe and S.-L. Zhang, “On a weighted quasi-residual minimization strategy of QMR for solving complex symmetric shifted linear systems”, Harrachov 2007-Computational Methods with Applications-, p. 92, Harrachov, Czech Republic, Aug. 19-25, 2007. |
| ◆ |
T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara, “Krylov subspace methods for solving complex symmetric shifted linear systems”, The 6th International Congress on Industrial and Applied Mathematics (ICIAM07), Zurich, Switzerland, Jul. 16-20, 2007. |
| ◆ |
T. Sogabe and S.-L. Zhang, “Sparse approximate inverse preconditioners for complex symmetric systems of linear equations”, 2007 International Conference on Preconditioning Techniques for Large Sparse Matrix Problems in Scientific and Industrial Applications (Precond 2007), pp. 90-93, Toulouse, France, Jul. 9-12, 2007. |
| ◆ |
T. Sogabe, M. Sugihara, and S.-L. Zhang, “Bi-conjugate residual method for nonsymmetric linear systems”, The First International Conference on Numerical Algebra and Scientific Computing (NASC06), pp. 30-31, Beijing, China, Oct. 22-25, 2006. |
| ◆ |
T. Sogabe and S.-L. Zhang, “CRS: a fast algorithm based on Bi-CR for solving nonsymmetric linear systems”, The First China-Japan-Korea Joint Conference on Numerical Mathematics, Sapporo, Japan, Aug. 3-7, 2006. |
| ◆ |
H. Hasegawa. T. Sogabe, T. Ogita, and T. Kajiyama, “Comparison of conjugate gradient method for nonsymmetric matrices”, The Joint GAMM-SIAM Conference on Applied Linear Algebra (ALA2006), p. 82, Dusseldorf, Germany, Jul. 24-27, 2006. |
| ◆ |
[Invited Talk]
T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara, “A numerical method for calculating the Green's function arising from electronic structure theory”, International Symposium on Frontiers of Computational Science (FCS2005), p. 32, Nagoya, Japan, Dec. 12-13. 2005 |
| ◆ |
T. Sogabe and S.-L. Zhang, “COCR methods for solving complex symmetric linear systems”, 11th GAMM - IMACS International Symposium on Scientific Computing, Computer Arithmetic, and Validated Numerics (SCAN2004), p. 107, Fukuoka, Japan, Oct. 4-8, 2004. |
| ◆ |
[Invited Talk] S.-L. Zhang and T. Sogabe, “An extension of the conjugate residual method to nonsymmetric linear systems”, The 7th China-Japan Joint Seminar for Computational Mathematics and Scientific Computing, Zhang Jia Jie, China, Aug. 16-20, 2004. |
| ◆ |
[Plenary Talk] S.-L. Zhang and T. Sogabe (speaker), “The Bi-CR method for nonsymmetric linear systems”, International Conference on Numerical Linear Algebra and Optimization (ICNLAO2003), p. 19, GuiLin, China, Oct. 7-10, 2003 |
| ◆ |
T. Sogabe, C.-H. Jin, K. Abe, and S.-L. Zhang, “On the improvement of the CGS method”, The 5th International Congress on Industrial and Applied Mathematics (ICIAM2003), p. 97, Sydney, Australia, Jul. 7-11, 2003. |
| ◆ |
楊 済栄, 今倉 暁, 曽我部 知広, 張 紹良, 「デフレーションを用いたGMRES(m)法に対するLOOK-BACK型のリスタートの適用」， 日本応用数理学会「行列・固有値の解法とその応用」研究部会 第10回研究会, NII, 2010.11. |
| ◆ |
曽我部知広，星健夫，張紹良，藤原毅夫， 「複素対称行列を係数に持つ一般化シフト線形方程式の数値解法」, 日本応用数理学会 2010年度 年会, 明治大学, pp. 243-244, 2010.9. |
| ◆ |
山下達也，宮田孝史，曽我部知広，張紹良， 「一般化固有値問題に関するArnoldi法の拡張」, 日本応用数理学会 2010年度 年会, 明治大学, pp. 37-38, 2010.9. |
| ◆ |
今倉 暁, 曽我部 知広, 張 紹良, 「Look-Back GMRES(m)法の収束の振る舞いについて」, 日本応用数理学会 2010年度 年会, 明治大学, pp. 25-26, 2010.9. |
| ◆ |
杜磊, 曽我部 知広, 張 紹良, 「準最小残差スムージングテクニックを用いたIDR(s)法」, 日本応用数理学会 2010年度 年会, 明治大学, pp. 23-24, 2010.9. |
| ◆ |
L. Du，T. Sogabe, and S.-L. Zhang， 「A quasi-minimal residual variant of the IDR(s) method for nonsymmetric linear systems」， 第39回数値解析シンポジウム，pp．75-78．三重県，鳥羽，2010.5. |
| ◆ |
山下達也，宮田孝史，曽我部知広，張紹良， 「実対称一般化固有値問題に対するArnoldi(M,W)法」， 第39回数値解析シンポジウム，pp．63-66．三重県，鳥羽，2010.5. |
| ◆ |
今倉 暁, 曽我部 知広, 張 紹良, 「非対称線形方程式のためのLook-Back GMRES(m)法 ?誤差方程式に基づくGMRES(m)法の拡張?」, 日本応用数理学会 2010年 研究部会 連合発表会, 筑波大学, 2010.3. |
| ◆ |
今倉 暁, 曽我部 知広, 張 紹良, 「GMRES(m)法のリスタートに対する考察およびその拡張」, 日本応用数理学会「行列・固有値の解法とその応用」研究部会 第８回研究会, NII, 2009.11. |
| ◆ |
早戸拓也，今倉暁，曽我部知広，張 紹良， 「離散wavelet変換を用いた正定値対称行列のためのFSAI前処理」， 日本応用数理学会2009年度年会, 大阪大学, 2009.9. |
| ◆ |
宮田考史，曽我部知広，張紹良， 「Jacobi-Davidson 法の修正方程式の解法 」， 第38回数値解析シンポジウム，pp．25-28．静岡，熱川ハイツ，2009.6. |
| ◆ |
今倉暁，曽我部知広，張紹良， 「残差多項式に基づいたLook-Back GMRES(m)法に対する解析」， 第38回数値解析シンポジウム，pp．37-40．静岡，熱川ハイツ，2009.6. |
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鈴木綾華，曽我部知広，張紹良， 「球面制約付き二次計画問題の効率的解法について」， 第38回数値解析シンポジウム，pp．71-74．静岡，熱川ハイツ，2009.6. |
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宮田考史，曽我部知広，張紹良, 「Jacobi-Davidson 法の修正方程式における近似固有値計算 」, 第14回計算工学講演会，東大，2009.5. （計算工学講演会論文集，日本計算工学会，Vol．14，No．1，2009，pp. 189-192．） |
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宮田考史，曽我部知広，張紹良, 「Jacobi-Davidson 法の修正方程式におけるシフト選択 」, 日本応用数理学会 2008年度年会, pp. 417-418, 東大, 2008.9. |
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今倉暁，曽我部知広，張紹良, 「GMRES(m)法と反復改良法の数理的つながり」, 日本応用数理学会 2008年度年会, pp. 407-408, 東大, 2008.9. |
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今倉暁，曽我部知広，張紹良, 「GMRES(m)法のリスタートについて」, 第37回数値解析シンポジウム, pp. 21-24, 仙北市, 2008.6. |
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今倉暁，曽我部知広，張紹良, 「陰的wavelet近似逆行列前処理のFinger Patternに対するブロック化技法について」, 第36回数値解析シンポジウム, pp. 109-112, 湯河原, 2007.6. |
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南さつき，曽我部知広，杉原正顯，張紹良, 「非エルミート行列を解くための準最小残差アプローチとその応用」, 日本応用数理学会平成1９年研究部会連合発表会, 名大, 2007.3. |
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前田祥兵，阿部邦美，曽我部知広，張紹良, 「AOR 法を用いた可変的前処理付き一般化共役残差法」, 日本応用数理学会平成1９年研究部会連合発表会, 名大, 2007.3. |
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今倉暁，曽我部知広，張紹良, 「Finger pattern のブロック化による陰的 wavelet 近似逆行列前処理の高速化」, 日本応用数理学会平成1９年研究部会連合発表会, 名大, 2007.3. |
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阿部邦美，曽我部知広，藤野清次，張紹良, 「非対称行列用共役残差法に基づく積型反復解法」, ハイパフォーマンスコンピューティングと計算科学シンポジウム(HPCS2007), pp. 17-24, つくば市, 2007.1. |
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今倉暁，曽我部知広，張 紹良, 「Block finger-pattern を用いた陰的wavelet近似逆行列前処理」, ハイパフォーマンスコンピューティングと計算科学シンポジウム(HPCS2007), p. 62, つくば市, 2007.1. (ポスター) |
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前田祥兵，阿部邦美，曽我部知広，張紹良, 「可変的前処理付き一般化共役残差法の内部解法の比較」, ハイパフォーマンスコンピューティングと計算科学シンポジウム(HPCS2007), p.60, つくば市, 2007.1. (ポスター) |
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大井幸平，水野吉規，曽我部知広，山本有作，張紹良, 「大規模疎行列の非線形固有値問題の数値解法」, ハイパフォーマンスコンピューティングと計算科学シンポジウム(HPCS2007), p.58, つくば市, 2007.1. (ポスター) |
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曽我部知広, 星健夫, 張紹良, 藤原毅夫, 「ナノ構造量子力学計算におけるQMR法の適用について」, 日本応用数理学会平成18年度年会, pp. 236-237, 筑波大, 2006.9. a4.pdf |
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曽我部知広, 張紹良, 「Bi-CR法の積型解法に基づく自乗共役残差(CRS)法」, 第35回数値解析シンポジウム, pp. 49-52, 吹田市, 2006.6. a4.pdf |
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南さつき, 曽我部知広, 杉原正顯, 張紹良, 「QMRアプローチのBiCR法への適用について」, 第35回数値解析シンポジウム, pp. 67-70, 吹田市, 2006.6. |
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南さつき, 曽我部知広, 杉原正顯, 張紹良, 「QMRアプローチのBiCR法への適用について 」, 日本応用数理学会平成18年研究部会連合発表会, 早大, 2006.3. |
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曽我部知広, 星健夫, 張紹良, 藤原毅夫 「シフト線形方程式を解くためのシードの切り替えについて」, 第34回数値解析シンポジウム, pp. 37-40 浜松, 2005.6. a4.pdf |
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曽我部知広, 杉原正顯, 張紹良, 「共役残差法の非対称行列用への拡張」, 日本応用数理学会平成17年研究部会連合発表会, 京大, 2005.3. |
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高山立, 星健夫, 曽我部知広, 張紹良, 藤原毅夫, 「大規模電子構造計算のための線形数値計算アルゴリズム」, 日本物理学会2004年秋季大会, 青森大, 2004.9. |
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藤原牧, 藤野清次, 曽我部知広, 張紹良, 「１反復当たりの計算量の削減による安定化CGS法の改良」, 日本応用数理学会平成16年度年会, pp. 252-253, 中央大, 2004.9. |
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[JSIAM若手優秀講演賞] 曽我部知広, 張紹良, 「シフト複素対称線形方程式のためのCOCR法」, 日本応用数理学会平成16年度年会, pp. 204-205, 中央大, 2004.9. a4.pdf |
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曽我部知広, 張紹良, 「複素対称線形方程式のためのCOCR法」, 第33回数値解析シンポジウム, pp. 73-76, 熱海, 2004.5. a4.pdf |
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曽我部知広, 鄭波, 橋本康, 張紹良, 「非対称線形方程式のためのBi-CR法」, 日本応用数理学会平成15年度年会, pp. 130-131, 京大, 2003.9. a4.pdf |
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曽我部知広, 鄭波, 橋本康, 張紹良, 「非対称Toeplitz行列に対するCG法の適用」, 第32回数値解析シンポジウム, pp.59-62, 箱根, 2003.5. a4.pdf |
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曽我部知広, 藤野清次, 張紹良, 「COCG法の積型解法について」, 日本応用数理学会平成14年度年会, pp. 33, 慶應大, 2002.9. a4.pdf |
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曽我部知広, 張紹良, 「CGS法の改良について」, 第31回数値解析シンポジウム, pp. 57-60, 南伊豆, 2002.6. a4.pdf |
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曽我部知広, 中田和秀, 張紹良, 「サイコロ式積型Krylov部分空間法」, 日本応用数理学会平成13年度年会, pp. 260-261, 九大, 2001.10. a4.pdf |
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宮田考史，曽我部知広，張紹良 「Jacobi-Davidson 法の収束性について -- シフト不変性に基づく改良」 数理研・研究集会 「科学技術計算アルゴリズムの数理的基盤と展開 」, pp. 38-40, 京大, 2010.10. |
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曽我部知広，星健夫，張紹良，藤原毅夫， 「一般化シフト線形方程式に対する重み付き準最小残差法 」, 数理研・研究集会 「科学技術計算アルゴリズムの数理的基盤と展開 」, pp. 14-16, 京大, 2010.10. |
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曽我部知広，星健夫，張紹良，藤原毅夫， 「複素対称行列を係数に持つ一般化シフト線形方程式の高速解法」, 数理研・研究集会 「数値解析と数値計算アルゴリズムの最近の展開」, pp. 30-32, 京大, 2009.12. |
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曽我部知広，張紹良， 「On an application of the QMR method to complex symmetric shifted linear systems」, 数理研・研究集会 「計算科学の基盤技術としての高速アルゴリズムとその周辺」, pp. 22-23, 京大, 2007.11. a4.pdf |
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曽我部知広, 「シフト複素対称線形方程式の数値解法」, ミニ研究会 「応用数理フロンティアとしての大規模物理シミュレーション」, 鳥取大, 2007.11. |
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大井幸平、水野吉規、曽我部知広、山本有作、張紹良 「大規模疎行列の非線形固有値問題の数値解法」, 第３回 日本応用数理学会「行列・固有値問題の解法とその応用」研究部会, 北海道旭川市, 2007.7. |
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前田祥兵，阿部邦美，曽我部知広，張紹良, 「可変的前処理付き一般化共役残差法の内部解法としてのAOR法」, 環瀬戸内応用数理研究部会第11回シンポジウム, 岡山理科大, 2007.7. |
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今倉暁，曽我部知広，張紹良, 「陰的wavelet近似逆行列前処理のfinger patternおよびそのブロック化技法」, 研究集会 「超大規模行列の数理的諸問題とその高速解法」, 環瀬戸内応用数理研究部会第11回シンポジウム, 岡山理科大, 2007.7. |
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曽我部知広，張紹良, 「シフト複素対称線形方程式のための重み付きQMR法について」, 研究集会 「超大規模行列の数理的諸問題とその高速解法」, 東大, 2007.3. |
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阿部邦美，曽我部知広，藤野清次，張紹良, 「AOR法を用いた可変的前処理付き一般化共役残差法」, 研究集会 「超大規模行列の数理的諸問題とその高速解法」, 東大, 2007.3. |
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南さつき，曽我部知広，杉原正顯，張紹良, 「Bi-CR法の積型解法の準最小残差アプローチの適用」, 研究集会 「超大規模行列の数理的諸問題とその高速解法」, 東大, 2007.3. |
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今倉暁，曽我部知広，張紹良, 「Finger patternのブロック化による陰的wavelet近似逆行列前処理の高速化」, 研究集会 「超大規模行列の数理的諸問題とその高速解法」, 東大, 2007.3. |
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前田祥兵，阿部邦美，曽我部知広，張紹良, 「AOR法を用いた可変的前処理付き一般化共役残差法」, 研究集会 「超大規模行列の数理的諸問題とその高速解法」, 東大, 2007.3. |
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長井康幸，曽我部知広，張紹良 「GPBi-CG法とBi-CGSTAB法を用いたハイブリッド型解法について」, 研究集会 「超大規模行列の数理的諸問題とその高速解法」, 東大, 2007.3. |
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曽我部知広, 星健夫, 張紹良, 藤原毅夫, 「シフト複素対称線形方程式に対するクリロフ部分空間法?Shifted COCG法を中心に? 」, 第２回 日本応用数理学会「行列・固有値問題の解法とその応用」研究部会, 国立情報学研究所, 東京, 2006.10. |
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曽我部知広, 「シフト線形方程式に対するクリロフ部分空間法 」, 第１回 線形計算(NLA)研究会, 東大, 2006.9. |
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曽我部知広, 「共役残差法の拡張」, 第３９回 ＬＡ研究会, 国立情報学研究所, 東京, 2006.9. |
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曽我部知広, 「ランチョス・プロセスに基づくクリロフ部分空間法とその拡張」, 第７０回 関西可積分系セミナー, 京大, 2004.7. |
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長谷川秀彦, 曽我部知広, 荻田武史, 「非対称行列から生成された対称行列に対するＣＧ法」 , 研究集会 「科学技術計算の数理的諸問題と高速解法」, 東大, 2004.3. |
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曽我部知広, 張紹良, 「非対称連立一次方程式のためのBi-CR法」, 研究集会 「科学技術計算の数理的諸問題と高速解法」, 東大, 2004.3. |
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曽我部知広, 張紹良, 「複素対称線形方程式を効率良く解くためのCOCR法」, 研究集会 「数値解析」, p. 10, 岡山理科大, 2004.2. |
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長谷川秀彦, 曽我部知広, 荻田武史, 「非対称行列から生成された対称行列に対するＣＧ法」 数理研・研究集会 「数値解析と新しい情報技術」, pp. 4-6, 京大, 2003.12. |
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曽我部知広, 張紹良, 「Bi-CR法の積型解法について」, 数理研・研究集会 「数値解析と新しい情報技術」, pp. 10-12, 京大, 2003.12. a4.pdf |
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T. Sogabe and S.-L. Zhang, "A stabilized conjugate gradient squared method for solving large non-Hermitian linear systems", LA Seminar, Tokyo, 2003.3. |
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曽我部知広, 張紹良, 「複素対称行列のためのクリロフ部分空間法について」, 科研費研究会 「ヘルムホルツ方程式の数値解法とその応用」, 電通大, 2003.2. |
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曽我部知広, 藤野清次, 張紹良, 「COCG法の積型解法について」, 数理研・研究集会 「微分方程式の数値解法と線形計算」, pp. 25-27, 京大, 2002.11. a4.pdf |