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零和自由半環(huán)上的e-可逆矩陣

2020-04-29 10:47:00趙曉璐邵勇

趙曉璐 邵勇

摘要:文中研究了交換的零和自由半環(huán)上的e-可逆矩陣。通過e-可逆矩陣所具有的性質(zhì),給出了e-可逆矩陣的等價(jià)刻畫。借助e-可逆矩陣、e-可逆對(duì)角矩陣及置換矩陣之間的內(nèi)在聯(lián)系,給出了e-可逆矩陣半群的一個(gè)確定的極大子群的半直積分解。

關(guān)鍵詞:零和自由半環(huán);e-可逆矩陣;極大子群;半直積

中圖分類號(hào):O151.21

DOI:10.16152/j.cnki.xdxbzr.2020-02-014

e-invertible matrices over zerosumfree semirings

ZHAO Xiaolu, SHAO Yong

Abstract: In this paper, the e-invertible matrices over commutative zerosumfree semirings are studied. Through the properties of e-invertible matrices, the equivalent characterizations of e-invertible matrices are given. The semidirect product decomposition of a certain maximal subgroup of the e-invertible matrix semigroup is given by investigating the internal relation among e-invertible matrices, e-invertible diagonal matrices and permutation matrices.

Key words: zerosumfree semiring; e-invertible matrix; matrix semigroup; semidirect product

眾所周知,布爾代數(shù)、模糊代數(shù)、分配格、坡等都是交換的零和自由半環(huán)。從20世紀(jì)50年代開始,很多學(xué)者都致力于零和自由半環(huán)上可逆矩陣的研究。1952年,Luce[1]討論了至少含有兩個(gè)元素的布爾代數(shù)上的矩陣,證明了矩陣是可逆的當(dāng)且僅當(dāng)它是正交矩陣;1988年,Zhao[2]證明了模糊代數(shù)上的矩陣是可逆的當(dāng)且僅當(dāng)它是置換矩陣;1991年,Zhao[3]得到了分配格上矩陣可逆的充要條件;2004年,Han[4]等給出了坡矩陣可逆的等價(jià)刻畫;2007年,Tan[5]研究了交換的零和自由半環(huán)上的可逆矩陣,得到了矩陣可逆的充要條件。2018年,Zhang 和Shao[6-7]將可逆矩陣的概念進(jìn)行了推廣,給出了半環(huán)上e-可逆矩陣的定義,并且研究了交換半環(huán)上e-可逆矩陣,給出其等價(jià)刻畫。本文主要研究交換的零和自由半環(huán)上的e-可逆矩陣,給出交換的零和自由半環(huán)上e-可逆矩陣的一些等價(jià)刻畫和e-可逆矩陣半群的極大子群中元素的基本形式,進(jìn)一步得到極大子群的結(jié)構(gòu)。

1 預(yù)備知識(shí)

本節(jié)將給出文中要用到的定義以及e-可逆矩陣的相關(guān)引理。

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(編 輯 張 歡)

收稿日期:2020-02-18

基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(11971383,11801239)

作者簡(jiǎn)介:趙曉璐,女,河南焦作人,從事半環(huán)代數(shù)理論的研究。

通信作者:邵勇,男,陜西戶縣人,教授,從事半環(huán)代數(shù)理論的研究。

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