On Monoids of plus-minus weighted Zero-Sum Sequences: The Isomorphism Problem and the Characterization Problem

Florin Fabsits, Alfred Geroldinger, Andreas Reinhart +1

Let $G$ be an additive abelian group. A sequence $S=g_1\cdot \dots \cdot g_{\ell }$ of terms from $G$ is a plus-minus weighted zero-sum sequence if there are $\varepsilon_1,\ldots,\v…