▁gave ▁an ▁invited ▁address ▁at ▁the ▁International ▁Congress ▁of ▁Mathemat icians ▁in ▁V ancouver , ▁about ▁applications ▁of ▁cat ast rop he ▁theory . ▁ ▁Ze eman ▁was ▁elected ▁as ▁a ▁Fellow ▁of ▁the ▁Royal ▁Society ▁in ▁ 1 9 7 5 , ▁and ▁was ▁awarded ▁the ▁Society ' s ▁Far ad ay ▁Medal ▁in ▁ 1 9 8 8 . ▁He ▁was ▁the ▁ 6 3 rd ▁President ▁of ▁the ▁London ▁Mathemat ical ▁Society ▁in ▁ 1 9 8 6 – 8 8 ▁giving ▁his ▁President ial ▁Address ▁on ▁ 1 8 ▁November ▁ 1 9 8 8 ▁On ▁the ▁classification ▁of ▁dynam ical ▁systems . ▁He ▁was ▁awarded ▁the ▁Senior ▁White head ▁Prize ▁of ▁the ▁Society ▁in ▁ 1 9 8 2 . ▁He ▁was ▁the ▁Society ' s ▁first ▁F order ▁lect urer , ▁involving ▁a ▁lecture ▁tour ▁in ▁New ▁Zealand , ▁in ▁ 1 9 8 7 . ▁Between ▁ 1 9 8 8 ▁and ▁ 1 9 9 4 ▁he ▁was ▁the ▁Professor ▁of ▁Ge ometry ▁at ▁G res ham ▁College . ▁ ▁In ▁ 1 9 7 8 , ▁Ze eman ▁gave ▁the ▁tele vised ▁series ▁of ▁Christmas ▁L ect ures ▁at ▁the ▁Royal ▁Institution . ▁From ▁these ▁grew ▁the ▁Mathemat ics ▁and ▁Engineering ▁Master classes ▁for ▁both ▁primary ▁and ▁secondary ▁school ▁children ▁that ▁now ▁fl our ish ▁in ▁forty ▁cent res ▁in ▁the ▁United ▁Kingdom . ▁ ▁In ▁ 1 9 8 8 , ▁Ze eman ▁became ▁Princi pal ▁of ▁H ert ford ▁College , ▁Oxford