Centralizing additive maps on rank r block triangular matrices
- 1 June 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Acta Scientiarum Mathematicarum
- Vol. 87 (1-2), 63-94
- https://doi.org/10.14232/actasm-020-586-y
Abstract
Let F be a field and let k, n(1), ..., n(k) be positive integers with n(1) + ...+ n(k) = n >= 2. We denote by Tn(1), ..., n(k) a block triangular matrix algebra over F with unity I-n and center Z(Tn(1), ..., n(k)). Fixing an integer 1 < r <= n with r not equal n when vertical bar F vertical bar = 2, we prove that an additive map psi: Tn(1), ..., n(k) -> Tn(1), ..., n(k )satisfies psi(A)A - A psi(A) is an element of Z(TTn(1), ..., n(k)) for every rank r matrices A is an element of Tn(1), ..., n(k )if and only if there exist an additive map mu: Tn(1), ..., n(k) -> F and scalars lambda, alpha is an element of F, in which alpha not equal 0 only if r = n, n(1) = n(k) = 1 and vertical bar F vertical bar = 3, such that psi(A) = lambda A + mu(A)I-n + alpha(a(11) + a(nn))E-1n for all A = (a(ij)) is an element of T-n1, ..., n(k), where E-ij is an element of Tn(1), ..., n(k) is the matrix unit whose (i, j)th entry is one and zero elsewhere. Using this result, a complete structural characterization of commuting additive maps on rank s > 1 upper triangular matrices over an arbitrary field is addressed.Keywords
This publication has 30 references indexed in Scilit:
- Commuting maps on some subsets of matrices that are not closed under additionLinear Algebra and its Applications, 2012
- Supercentralizing Maps in Prime SuperalgebrasCommunications in Algebra, 2009
- Commuting Maps of Triangular AlgebrasJournal of the London Mathematical Society, 2001
- On functional identities and commuting additive mappingsCommunications in Algebra, 1998
- Linear identities and commuting maps in rings with involutionCommunications in Algebra, 1997
- Commuting maps on lie idealsCommunications in Algebra, 1995
- Centralizing Maps in Prime Rings with InvolutionJournal of Algebra, 1993
- AN APPLICATION OF LOCAL MULTIPLIERS TO CENTRALIZING MAPPINGS OF C*-ALGEBRASThe Quarterly Journal of Mathematics, 1993
- Centralizing Automorphisms of Prime RingsCanadian Mathematical Bulletin, 1976
- Derivations in prime ringsProceedings of the American Mathematical Society, 1957