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一个欧氏环上二阶线性群的自同构
AUTOMORPHISMS OF THE TWO—DIMENSIONAL LINEAR GROUPS OVER A EUCLIDEAN RlNG
【摘要】 <正> 一般域上线性群的自同构问题已经清楚了,本文对一个欧氏环上二阶线性群的自同构问题,给出具体结果。§1.准备
【Abstract】 In this paper, for Euclidean ring R={(m+n21/5)/2}, the automorphisms of PSL2(R)and SL2(R)and PGL2(R)are decided concretely: (ⅰ) the identity map, (ⅱ) the automorphism is induced by an automorphism a→aσ of R. However, there are the following two types of automorphisms of GL2(R):(ⅰ)(T, S, K, U, Q, V)→(PTP-1, PSP-1, PKP-1, PUP-1, P(±Q) p-1, P(xV) P-1), where x=±1, ±e-1, P∈GL2(R); (ⅱ)(T, S, K, U, Q, V)→(PTP-1, PSP-1, PKP-1, PTUP-1, P(±Q)P-1, P(xQV)P-1), where x=±1, ±e, P∈GL2(R).
- 【文献出处】 北京师范大学学报(自然科学版) ,Journal of Beijing Normal University(Natural Science) , 编辑部邮箱 ,1983年02期
- 【被引频次】1
- 【下载频次】12