 Nyora kupfuurira kweiyi ndima - Pashure pokupinda kweWarsaw Pact muna 1968 muCzechoslovakia, haana kunyatsogamuchirwa nemaoko maviri. Saka muna 1971, akaenda kuOttawa, Canada, kwaakatanga dhipatimendi remasvomhu anowanika paCarlton University iro rakachinja zvikuru mashandiro anoita algebra, probability, uye nhamba. 