Yasumasa Kanada

flashing Lcmmas on Time Complexities with Applications to Formula Manipulation at! * l+ Et rclrr Goro, (2008)

Yasumasa Kanada, I. Fntroduction

Johnson[]-l and Horowitzt2l applied sorting to improve time compJ.exity of multiplication of univariate polynomials. Their results may be regarded as applications of the following LEMMA: Sorting...

1 Regular Paper Performance of Automatically Tuned Parallel GMRES(m) Method on Distributed Memory Machines (2007)

Hisayasu Kuroda, Takahiro Katagiri, Yasumasa Kanada

yy As for the presently available public parallel libraries are concerned, users have to set parameters, such as a selection of algorithms, an unrolling level, and a method of communication. These...

An Efficient Implementation of Parallel Eigenvalue Computation for Massively Parallel Processing (2007)

Takahiro Katagiri, Yasumasa Kanada

This article describes an efficient implementation and evaluation of a parallel eigensolver for computing all eigenvalues of dense symmetric matrices. Our eigensolver uses a Householder...

Carbon Nanotube Research Group (2007)

Syogo Tejima, Yoshiyuki Miyamoto, Kazuo Minami, Mikio Iizuka, Morinobu Endo, Eiji Osawa, ...

Carbon nanotubes (CNTs) and fullerenes have a lot of potential applications in nanotechnology. In the stream of efforts to exploit these nanoscale materials, the computational simulations have turned...

A Methodology for Automatically Tuned Parallel Tridiagonalization on Distributed Memory Vector-Parallel Machines (2000)

Takahiro Katagiri, Hisayasu Kuroda, Yasumasa Kanada

. In this paper, we describe an auto-tuning methodology for the parallel tridiagonalization to attain high performance. By searching the optimal set of three parameters for the performance, a highly...

Performance of Automatically Tuned Parallel GMRES(m) Method on Distributed Memory Machines (2000)

Hisayasu Kuroda, Takahiro Katagiri, Yasumasa Kanada

. As far as the presently available public parallel libraries are concerned, users have to set parameters, such as a selection of algorithms, an unrolling level, and a method of communication. These...

MONTE CARLO STUDY OF LOW-TEMPERATURE PROPERTIES OF QUANTUM FERROMAGNETIC XY MODEL ON THE TRIANGULAR LATTICE (1988)

Takasu, Masako, Miyashita, Seiji, Suzuki, Masuo, Kanada, Yasumasa

The S = 1/2 ferromagnetic XY model on the triangular lattice is investigated by quantum Monte Carlo methods based on the Suzuki-Trotter formula. The squared magnetization (M2x) / N2 is calculated for...

MONTE CARLO STUDY OF LOW-TEMPERATURE PROPERTIES OF QUANTUM FERROMAGNETIC XY MODEL ON THE TRIANGULAR LATTICE (1988)

Takasu, Masako, Miyashita, Seiji, Suzuki, Masuo, Kanada, Yasumasa

The S = 1/2 ferromagnetic XY model on the triangular lattice is investigated by quantum Monte Carlo methods based on the Suzuki-Trotter formula. The squared magnetization (M2x) / N2 is calculated for...

MONTE CARLO STUDY OF LOW-TEMPERATURE PROPERTIES OF QUANTUM FERROMAGNETIC XY MODEL ON THE TRIANGULAR LATTICE (1988)

Takasu, Masako, Miyashita, Seiji, Suzuki, Masuo, Kanada, Yasumasa

The S = 1/2 ferromagnetic XY model on the triangular lattice is investigated by quantum Monte Carlo methods based on the Suzuki-Trotter formula. The squared magnetization (M2x) / N2 is calculated for...