设F是特征不为2,3的域,T2(F)是F上2×2上三角矩阵代数。T是T2(F)中的所有立方幂等矩阵构成的子集。Φ(F)记所有从T2(F)到自身的单射Φ的集合且Φ满足:由A-λB∈T可以推出Φ(A)-λΦ(B)∈T.刻划了Φ(F)中Φ的形式。
Let F be an arbitrary field of characteristic different from 2 and 3. Let T2 (F) be the 2×2 upper triangular matrix algebras over F, and T be the subset of all tripotent matrices in T2 (F). The authors use Φ(F) to denote the set of all injective mapsΦfrom T2 (F) to itself such that if A - λB∈T, then Φ(A) -λΦ(B)∈T, for all λ∈F. The forms of Φ in Φ(F) are characterized.