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        剩余類環(huán)上二階對(duì)稱矩陣模的保行列式的加法映射

        2018-05-14 13:58:17生玉秋宋丹許璐珂楊婷賀三亭

        生玉秋 宋丹 許璐珂 楊婷 賀三亭

        摘 要:為了研究剩余類環(huán)上對(duì)稱矩陣模的保行列式的加法映射,首先說(shuō)明這類加法映射其實(shí)都是線性的,然后通過(guò)合同變換,利用數(shù)論知識(shí)和行列式運(yùn)算并借助于整數(shù)的標(biāo)準(zhǔn)素分解進(jìn)行分類討論,以確定主要基底的像,再利用映射的線性性質(zhì)確定所有矩陣的像,并討論了本質(zhì)上屬于同一類映射的映射形式之間的關(guān)系。結(jié)果表明,剩余類環(huán)上二階對(duì)稱矩陣模上保行列式的加法映射都是規(guī)范的。研究方法解決了一般環(huán)上非零元未必有逆的本質(zhì)帶來(lái)的困難,將基礎(chǔ)集擴(kuò)展到剩余類環(huán)上,此結(jié)果可以看作是保行列式問(wèn)題向環(huán)靠近的一小步,改進(jìn)了線性保持問(wèn)題的已有結(jié)果,對(duì)剩余類環(huán)上的其他保持問(wèn)題的研究也具有參考價(jià)值。

        關(guān)鍵詞:線性代數(shù);加法映射;剩余類環(huán);矩陣模;保行列式

        中圖分類號(hào):O151.21?MSC(2010)主題分類:15A86?文獻(xiàn)標(biāo)志碼:A

        文章編號(hào):1008-1542(2018)06-0527-05

        4?結(jié)?語(yǔ)

        本文主要刻畫(huà)了剩余類環(huán)上的二階矩陣模上的保行列式的線性映射的具體形式,將保行列式問(wèn)題的基礎(chǔ)集從域擴(kuò)展到了環(huán),改進(jìn)了已有文獻(xiàn)的結(jié)果。另外,數(shù)論理論的應(yīng)用在保持問(wèn)題中還未有過(guò),它主要用來(lái)克服一般環(huán)中非零元未必有逆帶來(lái)的困擾,也給其他保持問(wèn)題的解決提供了借鑒,但畢竟剩余類環(huán)相對(duì)特殊,未來(lái)還應(yīng)著力在除環(huán)或特殊的整環(huán)以至一般的交換環(huán)上考慮這類問(wèn)題。

        參考文獻(xiàn)/References:

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