- 著者
- Satoko Kikkawa Tsubasa Saito Emiko Ishiwata Hidehiko Hasegawa
- 出版者
- 一般社団法人 日本応用数理学会
- 雑誌
- JSIAM Letters (ISSN:18830609)
- 巻号頁・発行日
- vol.5, pp.9-12, 2013 (Released:2013-02-24)
- 参考文献数
- 6
- 被引用文献数
- 2
MuPAT enables the users to easily treat quadruple and octuple precision arithmetics as well as double precision arithmetic on Scilab. Using external C routines, we have also developed a high speed implementation MuPAT_c for Windows, Mac OS, and Linux. MuPAT_c reduced the computation time especially for all octuple precision arithmetic and inner product of quadruple precision arithmetic. MuPAT_c can run 90-1200 times faster than MuPAT. We applied three different precisions to tridiagonalization by the Lanczos method and confirmed that a high precision arithmetic was essential for the Lanczos method to get accurate eigenvalues of real symmetric matrices.