生玉秋
一類(lèi)反三角塊陣的群逆
生玉秋
(瓊臺(tái)師范學(xué)院 數(shù)理系,海南 ???571127)
研究環(huán)上一類(lèi)二階反三角塊陣的群逆問(wèn)題.利用矩陣群逆的性質(zhì)和環(huán)上矩陣運(yùn)算技巧,得到了一類(lèi)二階反三角塊陣群逆存在的充要條件,給出了具體的群逆表達(dá)式,并給出了應(yīng)用實(shí)例.
群逆;反三角塊陣;環(huán)
引理2來(lái)源于文獻(xiàn)[10]的引理2.4,其中(3)~(4)原文獻(xiàn)中沒(méi)有,但由(1)~(2)易推出.
類(lèi)似可證,條件(2)等價(jià)于條件(3). 證畢.
依次利用式(8)(1),可得
由定理、引理2~3可得到推論1.
給出3個(gè)應(yīng)用前面結(jié)果計(jì)算群逆的實(shí)例,涉及的矩陣都是模6的剩余類(lèi)環(huán)上的.
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Group inverses of a class of anti-triangular block matrix
SHENG Yuqiu
(Department of Mathematics and Physics,Qiongtai Normal University,Haikou 571127,China)
The group inverses of a class of second order anti-triangular block matrix over a ring are studied.Using the properties of group inverses of matrix and the operation skills of matrix over a ring,the necessary and sufficient conditions for the existence of group inverses of a class of second order anti-triangular block matrices was obtained.The concrete expressions of group inverses and the application examples was given.
group inverses;anti-triangular block matrix;ring
O151.21
A
10.3969/j.issn.1007-9831.2020.10.001
1007-9831(2020)10-0001-04
2020-07-15
國(guó)家自然科學(xué)基金項(xiàng)目(11771069,11526084)
生玉秋(1973-),女,黑龍江雙城人,教授,博士,從事矩陣代數(shù)研究.E-mail:shengyuqiu1973@163.com