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20192025
most citedA complete classification of three-dimensional algebras over and

2 citations · 2 across the 8 of their papers we have counts for

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8 papers

math.RA2025

A characterization of endo-commutativity of 3-dimensional curled algebras

Sin-Ei Takahasi, Kiyoshi Shirayanagi

A curled algebra is a non-associative algebra in which and are linearly dependent for every element . An algebra is called endo-commutative, if the square mapping from…

math.RA2024

A classification of 2-dimensional endo-commutative straight algebras of type II_1

Sin-Ei Takahasi, Kiyoshi Shirayanagi, Makoto Tsukada

In this paper, we present a complete classification of 2-dimensional endo-commutative straight algebras of type II over any field. An endo-commutative algebra is a non-associat…

math.RA2023

A Classification of 2-dimensional endo-commutative straight algebras of type I

Sin-Ei Takahasi, Kiyoshi Shirayanagi, Makoto Tsukada

In this paper, we provide a complete classification of 2-dimensional endo-commutative straight algebras of type I over any field. An endo-commutative algebra is a non-associative a…

math.RA2023

A classification of 2-dimensional endo-commutative straight algebras of rank 1 over a non-trivial field

Sin-Ei Takahasi, Kiyoshi Shirayanagi, Makoto Tsukada

An endo-commutative algebra is a nonassociative algebra in which the square mapping preserves multiplication. In this paper, we give a complete classification of 2-dimensional endo…

math.RA2023

A classification of endo-commutative curled algebras of dimension 2 over a non-trivial field

Sin-Ei Takahasi, Kiyoshi Shirayanagi, Makoto Tsukada

An endo-commutative algebra is a nonassociative algebra in which the square mapping preserves multiplication. In this paper, we give a complete classification of endo-commutative c…

math.RA2022

A Classification of Two-dimensional Endo-commutative Algebras over F_2

Sin-Ei Takahasi, Kiyoshi Shirayanagi, Makoto Tsukada

We introduce a new class of algebras called endo-commutative algebras in which the square mapping preserves multiplication, and provide a complete classification of endo-commutativ…

math.RA2019

A new invariant under congruence of nonsingular matrices

Kiyoshi Shirayanagi, Yuji Kobayashi

For a nonsingular matrix , we propose the form , the trace of the product of its transpose and inverse, as a new invariant under congruence of nonsingular matr…

math.RA2019★ 2 cited

A complete classification of three-dimensional algebras over and

Yuji Kobayashi, Kiyoshi Shirayanagi, Sin-Ei Takahasi +1

We provide a complete classification of three-dimensional associative algebras over the real and complex number fields based on a complete elementary proof. We list up all the mult…