After graduating, he continued working for his doctorate at Trinity on projective geometry . Cambridge was at that time a centre for geometry research with Baker 's school flourishing there. Edge's fellow students included P du Val and J G Semple but other famous geometers joined the group while Edge was at Cambridge including the slightly younger men H S M Coxeter and J A Todd .
Pagkatapos graduating, siya ang patuloy na nagsisikap para sa kanyang mga titulo ng doktor sa Tatlong-isa sa projective geometry. Cambridge ay sa oras na iyon ng isang sentro para sa geometry pananaliksik sa Baker 's paaralan yumayabong doon.