3 problems

Let a two-parameter representation have a boundary, whose components include closed curves, and let its rank invariant be the function assigning ranks to comparable parameter pairs…

Let $\mathcal{P}$ be a finite poset in which the $2\times 3$ grid is embedded, and let $\mathcal{R}$ be the set of connected spreads in $\mathcal{P}$. Generalized rank invariant co…

A persistence module is considered over a finite poset $\mathcal{P}$, with homological invariants defined relative to a chosen set of indecomposable modules. Indecomposable-relativ…