Some doubly semi-equivelar maps on the plane and the torus

Yogendra Singh, Anand Kumar Tiwari

A vertex $v$ in a map $M$ has the face-sequence $(p_1^{n_1}.\dots .p_k^{n_k})$, if there are $n_i$ numbers of $p_i$-gons incident at $v$ in the given cyclic order, for $1 \leq i…