1204.3109 (Dariusz Chruściński et al.)

Exposed positive maps in M_4(C)    [PDF]

Dariusz Chruściński, Gniewomir Sarbicki

It is shown that the family of so called Breuer-Hall maps in M_4(C) possesses strong spanning property and hence they are exposed in the convex cone of positive maps in M_4(C)

View original: http://arxiv.org/abs/1204.3109