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math.FA2026
Kadison duality for partially convex sets
Tea Å trekelj
This paper extends the Kadison duality between compact convex sets and function systems to the setting of partial convexity. A partially convex set is a set that is convex in a des…
math.FA2025
Construction of exceptional copositive matrices
Tea Štrekelj, Aljaž Zalar
An symmetric matrix is copositive if the quadratic form is nonnegative on the nonnegative orthant . The cone of copositive matrices…
math.FA2024
Extreme points of matrix convex sets and their spanning properties
Eric Evert, Benjamin Passer, Tea Å trekelj
This expository article gives a survey of matrix convex sets, a natural generalization of convex sets to the noncommutative (dimension-free) setting, with a focus on their extreme…