On positive linear maps preserving invertibility
β Scribed by M-D. Choi; D. Hadwin; E. Nordgren; H. Radjavi; P. Rosenthal
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 423 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0022-1236
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Let A be a unital matrix algebra, Ο : A β M n (C) a unital linear mapping and B the algebra generated by Ο(A). The mapping Ο is a homomorphism modulo the Jacobson radical in B if and only if for k = dim(B)dim(Ο(A)) + 3 the mapping Ο β id : A β M k (C) β B β M k (C) preserves invertibility. This resu
Suppose m is an n X 12 (n 2 2) matrix algebra over a C\*-algebra g, and Q? is a C\*-algebra. If p : i?X + '23 is a positive, disjoint linear map, then p preserves absolute values. In particular, for a linear map rp : '?I + '$3 of P-algebras, p preserves absolute values if and only if it is positive