On extremal positive maps acting between type I factors
Marcin Marciniak · Banach Center Publications · 2010
The paper is devoted to the problem of classification of extremal positive linear maps acting between ${\mathfrak B}({\cal K})$ and ${\mathfrak B}({\cal H})$ where ${\cal K}$ and ${\cal H}$ are Hilbert spaces. It is shown that every positive map with the