George A. Willis

George A. Willis FAA (an haife shi 10 Nuwamba 1954) masanin lissafi ne na Australiya. Willis ya sami digiri na BSc (1976) da BSc (Hons) a cikin lissafi daga Jami'ar Adelaide (1977), da kuma digiri na biyu daga Jami'an Newcastle a kan Tyne (1981) a karkashin kulawar Farfesa B. E. Johnson. A halin yanzu shi ne Farfesa Emeritus na Lissafi a Jami'ar Newcastle (Australia). An fi saninsa da ayyukansa a cikin ka'idar rukuni, musamman ƙungiyoyi masu rarrabe gaba ɗaya.

 Ayyuka 
An yi amfani da aikin Willis sosai a yankin Australia a Jami'ar Newcastle (Australia) . An nada shi cikakken Farfesa da kuma Farfesa na ARC a cikin 2009, da kuma ARC Laureate Fellow a cikin 2018.

Bayan bayar da digiri na biyu daga Jami'ar Newcastle a kan Tyne a 1981, ya koma Ostiraliya kuma ya ɗauki matsayi a matsayin Rothman's Postdoctoral Fellow a Jami'ar New South Wales . Daga 1983 zuwa 1985 ya yi aiki a Jami'ar Halifax, Nova Scotia, a matsayin Killam Postdoctoral Fellow, sannan ya sake komawa Ostiraliya a matsayin Sarauniya Elizabeth II Fellow a Jami'an Adelaide, kafin ya fara karatun a Jami'aren Flinders na Kudancin Ostiraliya. Willis daga nan ya koma Jami'ar Kasa ta Australiya a matsayin mai bincike a shekarar 1989, kafin a ƙarshe ya koma Jamiʼar Newcastle (Australia) don ɗaukar lacca inda yake yanzu Farfesa Emeritus.

 Bincike 
An buga takardar bincike ta farko ta Willis a 1982 bisa ga bincikensa na rubutun digirinsa. Binciken farko na Willis ya kasance a kan nazarin aiki da nazarin jituwa, kafin ya shiga cikin ka'idar rukuni, musamman ƙungiyoyin da ba su da alaƙa da juna (TDLC) da kuma hulɗa tsakanin algebra da topology. Manyan yankuna da sakamakon sun hada da:

 Sakamakon tsarin Willis na gaba ɗaya don ƙungiyoyi masu ƙarancin gida sun shirya hanyar fahimtar waɗannan ƙungiyoyin da suka kasance marasa iyaka na shekaru 60. Daga wannan aikin ya fito da abin da yanzu aka sani da "Willis' Theory",  "duk sabon fahimta" a cikin tsari da rarraba ƙungiyoyi masu zaman kansu.

 A watan Oktoba na shekara ta 2014 an gudanar da Arbeitsgemeinschaft a Oberwolfach wanda aka sadaukar da shi don bincike kan kungiyoyi masu rarraba gaba ɗaya.

 Willis ya nuna cewa factorisation a cikin Banach da algebra na rukuni yana yiwuwa a lokuta lokacin da Cohen factorisation theorem bai shafi ba, kuma ya rufe gardamar ta amfani da misalai marasa kyau.

 Willis da Yehuda Shalom sun hada hannu da wani takarda wanda ya amsa ka'idar Margulis da Zimmer ga wani nau'i mai yawa na kungiyoyi, kuma ya samar da tsari mai mahimmanci don la'akari da sakamakon da yawa a cikin ka'idar rigidity na kungiyoyin lissafi. Wannan takarda ta lashe Willis lambar yabo ta Gavin Brown ta 2016.

 Willis da Udo Baumgartner sun fara bayyana ƙungiyoyin raguwa a cikin shekara ta 2004, ta hanyar tabbatar da ka'idar cewa idan sikelin ba 1 ba to ƙungiyar raguwa ba ta da mahimmanci.

 Manazarta 

Rukuni:Rayayyun mutane
Rukuni:Haihuwan 1954