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- W2374804879 abstract "Let M2 be the algebra of all 2 × 2 matrices over a ?eld F of characteristic 2 and |F| 2. Let P2 be the set of all idempotent matrices in M2. It is shown that if φ : M2 → M2 is an injective map such that A ? λB ∈ P2 implies φ(A) ? λφ(B) ∈ P2 for any A,B ∈ M2 and λ ∈F, then either φ is of the form φ(A) = TAT? for any A ∈ M2, or φ is of 1 the form φ(A) = TAtT? for any A ∈ M2, where T ∈ M2 is a nonsingular matrix. 1" @default.
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- W2374804879 date "2004-01-01" @default.
- W2374804879 modified "2023-09-25" @default.
- W2374804879 title "Maps on 2 × 2 matrix algebras preserving idempotence" @default.
- W2374804879 hasPublicationYear "2004" @default.
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