%0 Journal Article %A Fritz Gesztesy %A Michael Pang %T On (conditional) positive semidefiniteness in a matrix-valued context %J Studia Mathematica %D 2017 %P 143-192 %V 236 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4064/sm8531-7-2016/ %R 10.4064/sm8531-7-2016 %G en %F 10_4064_sm8531_7_2016