设F是特征不为2且元素个数大于3的域,n和m是正整数,令Sn(F)和Mn(F)分别是F上n×n对称矩阵空间和全矩阵空间,GLm(F)为F上m阶一般线性群,设f是从Sn(F)到Mm(F)上的线性映射,若f满足f(X)^-1=f(X^-1),↓AX∈Sn(F)∩GLn(C),称f为保逆线性映射.刻画了从Sn(F)到Mm(F)以及从Sn(F)到Sm(F)上保逆线性映射.
Suppose F is a field of characteristic not 2 and | F| 〉 3, m and n are positive integers, Let Sn (F) and Mm, (F) be the vector spaces of all n×n symmetric matrices and all m×m full matrices over F, respectively. Let GLn (F) be the set of all n x n nonsingular matrices. A linear map f from Sn (F) to Mm (F) is said to inverse - preserving if f (X)^-1 =f(X^-1) for every X∈Sn (F) ∩GLn (F). Linear maps preserving inverses of matrices from Sn(F) to Mm(F) ( respectively Sm(F) ) are characterized.