Tilings of the sphere by congruent quadrilaterals I: edge combination $a^{2}bc$

Yixi Liao, Pinren Qian, Erxiao Wang +1

The edge-to-edge tilings of the sphere by congruent quadrilaterals of Type $a^{2}bc$ are classified as $3$ classes: a sequence of two-parameter families of $2$-layer earth map tiling…