2 papers
math.FA2021
Linear matrix maps for which positivity and complete positivity coincide
Sanne ter Horst, Alma Naude
By the Choi matrix criteria it is easy to determine if a specific linear matrix map is completely positive, but to establish whether a linear matrix map is positive is much less st…
math.OC2020
The convex invertible cone structure of positive real odd rational matrix functions
Sanne ter Horst, Alma Naudé
Positive real odd matrix functions, often referred to as positive real lossless matrix functions, play an important role in many applications in multi-port electrical systems. In t…