On Jacobian group of the $\mathrm{\Delta }$-graph

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