The $2+1$ convex hull of a finite set

Pablo Angulo, Carlos García-Gutiérrez

We study ${\mathbb{R}}^2\oplus \mathbb{R}$-separately convex hulls of finite sets of points in ${\mathbb{R}}^3$, as in KirchheimMullerSverak2003. This notion of convexity, which we call…