f group. V, no. turn to th, related question of recognising the aqulualonca. under . group, of an arbitrary air of figures. He remit, belou ver. surprising to us. for ». had supposed that such probl.s ver. not generally .f ffotte-order. A nmber of questions ramin open, and the superflci.il,… … 1. presented a. too equal part, A and B and « a.k: i. the figure In part B a rigid translation of the figure In part A! More generally, i, there elenent g fron sour gtvan group G of tranafomatlon. for vhich l 1, tha remit of g operating on A? Hhat order predicate, are require to oak, such…