Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Masayoshi Yoshikawa"'
Autor:
Akihide Hanaki, Masayoshi Yoshikawa
Publikováno v:
Discrete Mathematics. 346:113509
For a finite connected simple graph, the Terwilliger algebra is a matrix algebra generated by the adjacency matrix and idempotents corresponding to the distance partition with respect to a fixed vertex. We will consider algebras defined by two other
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08f11b8c137f56a9cf8e622e23088c61
https://doi.org/10.1016/j.disc.2023.113509
https://doi.org/10.1016/j.disc.2023.113509
Autor:
Masayoshi Yoshikawa, Akihide Hanaki
Publikováno v:
Algebraic Combinatorics. 4:533-540
We construct a pair of non-commutative rank 8 association schemes from a rank 3 non-symmetric association scheme. For the pair, two association schemes have the same character table but different Frobenius-Schur indicators. This situation is similar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6608ac64b3367ce11da29237240df47a
https://doi.org/10.5802/alco.167
https://doi.org/10.5802/alco.167
Autor:
Masayoshi Yoshikawa
Publikováno v:
Discrete Mathematics. 345:112822
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86897c4515b55fd5c83bd6421540618a
https://doi.org/10.1016/j.disc.2022.112822
https://doi.org/10.1016/j.disc.2022.112822
Autor:
Masayoshi Yoshikawa
Publikováno v:
Discrete Mathematics. 341:2028-2034
In the present paper, we will define the higher Frobenius–Schur indicators and the higher indicators of association schemes as a generalization of those of finite groups. The higher indicators of any association scheme are always positive rational
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b62db495b2c84f84daa2acd63312ef1
https://doi.org/10.1016/j.disc.2018.04.006
https://doi.org/10.1016/j.disc.2018.04.006
Autor:
Masayoshi Yoshikawa
Publikováno v:
European Journal of Combinatorics. 51:433-442
The notion of an association scheme is a far reaching generalization of the notion of a group. During the past twenty years, many concepts and results in finite group theory have been generalized to finite scheme theory. In the present paper, we sugg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fb278aef7dc8f03b6f76d50a24c1a34
https://doi.org/10.1016/j.ejc.2015.07.019
https://doi.org/10.1016/j.ejc.2015.07.019
Autor:
Masayoshi Yoshikawa
Publikováno v:
Discrete Mathematics. 343:111706
A relation s of an association scheme is called regular if s ∗ s s = { s } . In Yoshikawa (2015), it was shown that, for each regular relation s of an association scheme S , s ∗ s is a closed subset of S . In the present article, we show that, fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98e2ee17bde417dcc6eb9a2aefefca95
https://doi.org/10.1016/j.disc.2019.111706
https://doi.org/10.1016/j.disc.2019.111706
Publikováno v:
Biomineralization ISBN: 9789811310010
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6349c5809874c5a8bb01fcbf632f7bcd
https://doi.org/10.1007/978-981-13-1002-7_44
https://doi.org/10.1007/978-981-13-1002-7_44
Publikováno v:
Biomineralization ISBN: 9789811310010
The radula chiton teeth, Acanthopleura japonica, were examined using transmission electron microscopy (TEM). After cutting into segments corresponding roughly to three developmental stages from the onset of tooth development, the middle and the fully
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f0ba8f0cd92a6acf9d9876dcf339bb8
https://doi.org/10.1007/978-981-13-1002-7_2
https://doi.org/10.1007/978-981-13-1002-7_2
Autor:
Masayoshi Yoshikawa, Osamu Shimabukuro
Publikováno v:
Linear Algebra and its Applications. 466:208-217
The adjacency algebra of an association scheme is defined over an arbitrary field. In general, it is always semisimple over a field of characteristic zero but not always semisimple over a field of positive characteristic. The structures of adjacency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebff02710b9f7fb7b8e09693e49c6971
https://doi.org/10.1016/j.laa.2014.10.013
https://doi.org/10.1016/j.laa.2014.10.013
Autor:
Masayoshi Yoshikawa
Publikováno v:
Communications in Algebra. 42:2046-2060
We will investigate the structure of noncommutative imprimitive association schemes of rank 6 and the representation of their adjacency algebras. From this investigation, we will construct new integral standard generalized table algebras with three p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f379cd48f3a42d44baf4f0da9e0a7959
https://doi.org/10.1080/00927872.2012.754446
https://doi.org/10.1080/00927872.2012.754446