Partial Matchings Induced by Morphisms between Persistence Modules

We study how to obtain partial matchings using the block function $\mathcal{M}_f$, a novel concept obtained from a morphism $f$ between persistence modules. $\mathcal{M}_f$ is defined algebraically and is linear with respect to direct sums of morphisms. We study some interesting properties of $\mathcal{M}_f$, and provide a way to obtain $\mathcal{M}_f$ using matrix operations.