On Jacobian group of the $\Delta$-graph

Abstract

In the present paper we compute the Jacobian group of $\Delta$-graph $\Delta (n;k,l,m).$ The notion of $\Delta$-graph continues the list of families of $I$-, $Y$- and $H$-graphs well-known in the graph theory. In particular, graph $\Delta (n;1,1,1)$ is isomorphic to discrete torus $C_3\times C_n.$ It this case, the structure of the Jacobian group will be find explicitly.

arXiv admin note: text overlap with arXiv:2111.04304