摘要：Let Φ 1 ,...,Φ n be strictly positive linear maps from a unital C ∗ - algebra A into a C ∗ -algebra B and let Φ = ∑ n i=1 Φ i be unital. If f is an operator convex function on an interval J, then for every self-adjoint operator A ∈ A with spectrum contained in J, the following refinement of the Choi– Davis–Jensen inequality holds.
