Edit Profile Imakura, Akira Compute Distance To: Compute Author ID: imakura.akira Published as: Imakura, A.; Imakura, Akira External Links: ORCID Documents Indexed: 28 Publications since 2009 all top 5 Co-Authors 2 single-authored 15 Sakurai, Tetsuya 6 Du, Lei 5 Zhang, Shao-Liang 4 Futamura, Yasunori 4 Sogabe, Tomohiro 4 Tadano, Hiroto 2 Chen, Hongjia 2 Maeda, Yasuyuki 2 Yano, Takahiro 1 Alvermann, Andreas 1 Basermann, Achim 1 Bungartz, Hans-Joachim 1 Carbogno, Christian 1 Carpentieri, Bruno 1 Ernst, Dominik 1 Fehske, Holger 1 Galgon, Martin 1 Gu, Xian-Ming 1 Hager, Georg 1 Hasegawa, Tetsuya 1 Huang, Ting-Zhu 1 Huber, Sarah E. 1 Huckle, Thomas Kilian 1 Ida, Akihiro 1 Ishikawa, Youichi 1 Kawai, Masatoshi 1 Köcher, Simone 1 Kreutzer, Moritz 1 Kus, Pavel 1 Lang, Bruno 1 Lederer, Hermann 1 Li, Rencang 1 Manin, Valeriy 1 Marek, Andreas 1 Matsufuru, Hideo 1 Morikuni, Keiichi 1 Nakajima, Kengo 1 Nemec, Lydia 1 Reuter, Karsten 1 Rippl, Michael 1 Röhrig-Zöllner, Melven 1 Saito, Shusaku 1 Scheffler, Matthias 1 Scheurer, Christoph 1 Shahzad, Faisal 1 Simoes Brambila, Danilo 1 Su, Lijiong 1 Sumiyoshi, Kohsuke 1 Takayasu, Akitoshi 1 Thies, Jonas 1 Tisseur, Françoise 1 Wellein, Gerhard 1 Yamada, Haruka 1 Yamamoto, Yusaku 1 Zhang, Ke all top 5 Serials 10 JSIAM Letters 6 Japan Journal of Industrial and Applied Mathematics 2 Journal of Computational and Applied Mathematics 2 Applications of Mathematics 2 Numerical Algorithms 2 East Asian Journal on Applied Mathematics 1 Computers & Mathematics with Applications 1 Applied Mathematics Letters 1 Numerical Linear Algebra with Applications 1 Journal of Mathematical Research with Applications all top 5 Fields 27 Numerical analysis (65-XX) 4 Linear and multilinear algebra; matrix theory (15-XX) 2 Functions of a complex variable (30-XX) 2 Operations research, mathematical programming (90-XX) 2 Systems theory; control (93-XX) 1 Computer science (68-XX) 1 Quantum theory (81-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH 14 Publications have been cited 30 times in 26 Documents Cited by ▼ Year ▼ Error bounds of Rayleigh-Ritz type contour integral-based eigensolver for solving generalized eigenvalue problems. Zbl 1333.65039Imakura, Akira; Du, Lei; Sakurai, Tetsuya 8 2016 A block Arnoldi-type contour integral spectral projection method for solving generalized eigenvalue problems. Zbl 1311.65037Imakura, Akira; Du, Lei; Sakurai, Tetsuya 4 2014 Relationships among contour integral-based methods for solving generalized eigenvalue problems. Zbl 1375.65058Imakura, Akira; Du, Lei; Sakurai, Tetsuya 3 2016 Locally optimal and heavy ball GMRES methods. Zbl 1354.65063Imakura, Akira; Li, Ren-Cang; Zhang, Shao-Liang 3 2016 A weighted block GMRES method for solving linear systems with multiple right-hand sides. Zbl 1416.65085Imakura, Akira; Du, Lei; Tadano, Hiroto 2 2013 An efficient variant of the restarted shifted GMRES method for solving shifted linear systems. Zbl 1289.65057Imakura, Akira; Sogabe, Tomohiro; Zhang, Shaoliang 2 2013 Efficient variants of the CMRH method for solving a sequence of multi-shifted non-Hermitian linear systems simultaneously. Zbl 1434.65027Gu, Xian-Ming; Huang, Ting-Zhu; Carpentieri, Bruno; Imakura, Akira; Zhang, Ke; Du, Lei 1 2020 Benefits from using mixed precision computations in the ELPA-AEO and ESSEX-II eigensolver projects. Zbl 1418.65044Alvermann, Andreas; Basermann, Achim; Bungartz, Hans-Joachim; Carbogno, Christian; Ernst, Dominik; Fehske, Holger; Futamura, Yasunori; Galgon, Martin; Hager, Georg; Huber, Sarah; Huckle, Thomas; Ida, Akihiro; Imakura, Akira; Kawai, Masatoshi; Köcher, Simone; Kreutzer, Moritz; Kus, Pavel; Lang, Bruno; Lederer, Hermann; Manin, Valeriy; Marek, Andreas; Nakajima, Kengo; Nemec, Lydia; Reuter, Karsten; Rippl, Michael; Röhrig-Zöllner, Melven; Sakurai, Tetsuya; Scheffler, Matthias; Scheurer, Christoph; Shahzad, Faisal; Simoes Brambila, Danilo; Thies, Jonas; Wellein, Gerhard 1 2019 Efficient implementations of the modified Gram-Schmidt orthogonalization with a non-standard inner product. Zbl 1436.65046Imakura, Akira; Yamamoto, Yusaku 1 2019 Improving backward stability of Sakurai-Sugiura method with balancing technique in polynomial eigenvalue problem. Zbl 06770049Chen, Hongjia; Imakura, Akira; Sakurai, Tetsuya 1 2017 Block Krylov-type complex moment-based eigensolvers for solving generalized eigenvalue problems. Zbl 1368.65058Imakura, Akira; Sakurai, Tetsuya 1 2017 An efficient variant of the GMRES(\(m\)) method based on the error equations. Zbl 1287.65022Imakura, Akira; Sogabe, Tomohiro; Zhang, Shao-Liang 1 2012 A parameter optimization technique for a weighted Jacobi-type preconditioner. Zbl 1271.65051Imakura, Akira; Sakurai, Tetsuya; Sumiyoshi, Kohsuke; Matsufuru, Hideo 1 2012 An implicit wavelet sparse approximate inverse preconditioner using block finger pattern. Zbl 1224.65074Imakura, A.; Sogabe, T.; Zhang, S.-L. 1 2009 Efficient variants of the CMRH method for solving a sequence of multi-shifted non-Hermitian linear systems simultaneously. Zbl 1434.65027Gu, Xian-Ming; Huang, Ting-Zhu; Carpentieri, Bruno; Imakura, Akira; Zhang, Ke; Du, Lei 1 2020 Benefits from using mixed precision computations in the ELPA-AEO and ESSEX-II eigensolver projects. Zbl 1418.65044Alvermann, Andreas; Basermann, Achim; Bungartz, Hans-Joachim; Carbogno, Christian; Ernst, Dominik; Fehske, Holger; Futamura, Yasunori; Galgon, Martin; Hager, Georg; Huber, Sarah; Huckle, Thomas; Ida, Akihiro; Imakura, Akira; Kawai, Masatoshi; Köcher, Simone; Kreutzer, Moritz; Kus, Pavel; Lang, Bruno; Lederer, Hermann; Manin, Valeriy; Marek, Andreas; Nakajima, Kengo; Nemec, Lydia; Reuter, Karsten; Rippl, Michael; Röhrig-Zöllner, Melven; Sakurai, Tetsuya; Scheffler, Matthias; Scheurer, Christoph; Shahzad, Faisal; Simoes Brambila, Danilo; Thies, Jonas; Wellein, Gerhard 1 2019 Efficient implementations of the modified Gram-Schmidt orthogonalization with a non-standard inner product. Zbl 1436.65046Imakura, Akira; Yamamoto, Yusaku 1 2019 Improving backward stability of Sakurai-Sugiura method with balancing technique in polynomial eigenvalue problem. Zbl 06770049Chen, Hongjia; Imakura, Akira; Sakurai, Tetsuya 1 2017 Block Krylov-type complex moment-based eigensolvers for solving generalized eigenvalue problems. Zbl 1368.65058Imakura, Akira; Sakurai, Tetsuya 1 2017 Error bounds of Rayleigh-Ritz type contour integral-based eigensolver for solving generalized eigenvalue problems. Zbl 1333.65039Imakura, Akira; Du, Lei; Sakurai, Tetsuya 8 2016 Relationships among contour integral-based methods for solving generalized eigenvalue problems. Zbl 1375.65058Imakura, Akira; Du, Lei; Sakurai, Tetsuya 3 2016 Locally optimal and heavy ball GMRES methods. Zbl 1354.65063Imakura, Akira; Li, Ren-Cang; Zhang, Shao-Liang 3 2016 A block Arnoldi-type contour integral spectral projection method for solving generalized eigenvalue problems. Zbl 1311.65037Imakura, Akira; Du, Lei; Sakurai, Tetsuya 4 2014 A weighted block GMRES method for solving linear systems with multiple right-hand sides. Zbl 1416.65085Imakura, Akira; Du, Lei; Tadano, Hiroto 2 2013 An efficient variant of the restarted shifted GMRES method for solving shifted linear systems. Zbl 1289.65057Imakura, Akira; Sogabe, Tomohiro; Zhang, Shaoliang 2 2013 An efficient variant of the GMRES(\(m\)) method based on the error equations. Zbl 1287.65022Imakura, Akira; Sogabe, Tomohiro; Zhang, Shao-Liang 1 2012 A parameter optimization technique for a weighted Jacobi-type preconditioner. Zbl 1271.65051Imakura, Akira; Sakurai, Tetsuya; Sumiyoshi, Kohsuke; Matsufuru, Hideo 1 2012 An implicit wavelet sparse approximate inverse preconditioner using block finger pattern. Zbl 1224.65074Imakura, A.; Sogabe, T.; Zhang, S.-L. 1 2009 all cited Publications top 5 cited Publications all top 5 Cited by 49 Authors 11 Imakura, Akira 6 Sakurai, Tetsuya 4 Du, Lei 2 Huang, Ting-Zhu 2 Li, Rencang 2 Yamamoto, Yusaku 2 Yin, Guojian 2 Zhang, Shao-Liang 1 Abdaoui, Ilias 1 Aishima, Kensuke 1 Bai, Zhaojun 1 Carpentieri, Bruno 1 Chen, Hongjia 1 Elbouyahyaoui, Lakhdar 1 Fukaya, Takeshi 1 Futamura, Yasunori 1 Glatz, Andreas 1 Gopalakrishnan, Jay 1 Grubišić, Luka 1 Gu, Xian-Ming 1 Hasegawa, Tetsuya 1 Heyouni, Mohammed 1 Hoshi, Takeo 1 Jing, Yanfei 1 Kannan, Ramaseshan 1 Kimmel, Gregory J. 1 Lin, Wen-Wei 1 Morikuni, Keiichi 1 Nakatsukasa, Yuji 1 Ogita, Takeshi 1 Ohashi, Asuka 1 Ovall, Jeffrey S. 1 Ozaki, Katsuhisa 1 Saad, Yousef 1 Shen, Chungen 1 Sogabe, Taro 1 Sogabe, Tomohiro 1 Su, Lijiong 1 Tadano, Hiroto 1 Takayasu, Akitoshi 1 Teng, Zhongming 1 Terao, Takeshi 1 Wang, Xuansheng 1 Xi, Yuanzhe 1 Yanagisawa, Yuka 1 Yano, Takahiro 1 Yuan, Pei 1 Zhang, Ke 1 Zhang, Lei-Hong all top 5 Cited in 13 Serials 5 Journal of Computational and Applied Mathematics 4 Japan Journal of Industrial and Applied Mathematics 3 Numerical Algorithms 3 SIAM Journal on Scientific Computing 3 JSIAM Letters 1 Mathematics of Computation 1 Applied Mathematics Letters 1 Journal of Scientific Computing 1 Numerical Linear Algebra with Applications 1 Mathematical & Computational Applications 1 Science China. Mathematics 1 Special Matrices 1 Results in Applied Mathematics all top 5 Cited in 9 Fields 26 Numerical analysis (65-XX) 6 Linear and multilinear algebra; matrix theory (15-XX) 3 Computer science (68-XX) 2 Functions of a complex variable (30-XX) 2 Operations research, mathematical programming (90-XX) 1 Partial differential equations (35-XX) 1 Operator theory (47-XX) 1 Global analysis, analysis on manifolds (58-XX) 1 Mechanics of deformable solids (74-XX) Citations by Year