On maps preserving products of matrices

On maps preserving products of matrices
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DOI:
10.1016/j.laa.2018.10.029
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发表时间:
2019-02
影响因子:
1.1
通讯作者:
Louisa Catalano;Samuel Hsu;Regan Kapalko
Louisa Catalano;Samuel Hsu;Regan Kapalko
中科院分区:
数学3区
文献类型:
--
作者:
Louisa Catalano;Samuel Hsu;Regan Kapalko

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设D为特性不同于2的除环,且令R=M n (D)。本文的第一个目标是描述一个加性映射 f: R→ R,对于每个 x, y ∈ R 满足恒等式 f (x) f (y)= m,使得 x y= k,其中 m,k ∈ R 是固定的可逆元素。另外,令 M= M n (C),即所有具有复数项的 n× n 矩阵的集合。我们将描述一个双射线性映射 g: M→ M 满足 g (X)∘ g (Y)= M,只要 X∘ Y= K 对于每个 X,Y ∈ M,其中 M,K ∈ M 是固定的,∘ 表示 Jordan 乘积。
Let D be a division ring with characteristic different from 2, and let R= M n (D). The first goal of this paper is to describe an additive map f: R→ R satisfying the identity f (x) f (y)= m for every x, y∈ R such that x y= k, where m, k∈ R are fixed invertible elements. Additionally, let M= M n (C), the set of all n× n matrices with complex entries. We will describe a bijective linear map g: M→ M satisfying g (X)∘ g (Y)= M whenever X∘ Y= K for every X, Y∈ M, where M, K∈ M are fixed, and∘ denotes the Jordan product.