▁moved ▁to ▁England ▁one ▁year ▁after ▁his ▁birth . ▁After ▁being ▁educated ▁at ▁Christ ' s ▁Hospital ▁in ▁Hor sh am , ▁West ▁Sus sex , ▁he ▁served ▁as ▁a ▁F lying ▁Officer ▁with ▁the ▁Royal ▁Air ▁Force ▁from ▁ 1 9 4 3 ▁to ▁ 1 9 4 7 . ▁He ▁studied ▁mathematics ▁at ▁Christ ' s ▁College , ▁Cambridge , ▁but ▁had ▁forgotten ▁much ▁of ▁his ▁school ▁mathematics ▁while ▁serving ▁for ▁the ▁air ▁force . ▁He ▁received ▁an ▁MA ▁and ▁Ph D ▁( the ▁latter ▁under ▁the ▁super vision ▁of ▁Sh a un ▁W yl ie ) ▁from ▁the ▁University ▁of ▁Cambridge , ▁and ▁became ▁a ▁Fellow ▁of ▁Gon ville ▁and ▁C ai us ▁College ▁where ▁he ▁t utor ed ▁David ▁F ow ler ▁and ▁John ▁H orton ▁Con way . ▁ ▁Academ ic ▁career ▁Ze eman ▁is ▁one ▁of ▁the ▁found ers ▁of ▁eng ulf ing ▁theory ▁in ▁piece wise ▁linear ▁topology ▁and ▁is ▁cred ited ▁with ▁working ▁out ▁the ▁eng ulf ing ▁theorem ▁( in dep end ently ▁also ▁worked ▁out ▁by ▁John ▁St all ings ), ▁which ▁can ▁be ▁used ▁to ▁prove ▁the ▁piece wise ▁linear ▁version ▁of ▁the ▁Po inc ar é ▁conject ure ▁for ▁all ▁dimensions ▁above ▁four . ▁ ▁After ▁working ▁at ▁Cambridge ▁( d uring ▁which ▁he ▁spent ▁a ▁year ▁abroad ▁at ▁University ▁of ▁Chicago ▁and ▁Pr inc eton ▁as ▁a ▁H ark ness ▁Fellow ) ▁and ▁the ▁Institut ▁des ▁Haut es ▁Ét udes ▁Scient if iques , ▁he ▁founded ▁the ▁Mathemat ics ▁Department