Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9498236 | Linear Algebra and its Applications | 2005 | 17 Pages |
Abstract
Let V be an n-dimensional Hilbert space. Suppose H is a subgroup of the symmetric group of degree m, and Ï:HâC is a character of degree 1 on H. Consider the symmetrizer on the tensor space âmVS(v1ââ¯âvm)=1|H|âÏâHÏ(Ï)vÏ-1(1)ââ¯âvÏ-1(m)defined by H and Ï. The subspace VÏm(H) of âmV spanned by S(âmV) is called the symmetry class of tensors over V associated with H and Ï. The elements in VÏm(H) of the form S(v1 â â¯Â â vm) are called decomposable tensors and are denoted by v1 â â¯Â â vm. For any linear operator T acting on V, there is an (unique) induced operator KÏ(T) (or just K(T) for notational simplicity) acting on VÏm(H) satisfyingK(T)v1ââ¯âvm=Tv1ââ¯âTvm.We characterize multiplicative maps Ï such that F(Ï(T)) = F(T) for all operators T acting on V, where F are various scalar or set valued functions including the spectral radius, (decomposable) numerical radius, spectral norm, spectrum, (decomposable) numerical range of T or K(T).
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Wai-Shun Cheung, M. Antonia Duffner, Chi-Kwong Li,