Nathan Mendelsohn

Nathan Saul Mendelsohn, CM FRSC (Afrilu 14, 1917 - Yuli 4, 2006) ɗan asalin Amurka ne wanda ya zauna kuma ya yi aiki a Kanada . Mendelsohn ya kasance mai bincike a fannoni da yawa na Lissafi mai hankali, gami da ka'idar rukuni da haɗuwa.

## Rayuwa ta farko da ilimi
An haifi Mendelsohn a shekara ta 1917 a Brooklyn, Birnin New York, babba cikin 'ya'ya hudu na Samuel Mendelsohr (1880-1959) da Sylvia, née Kirschenbaum (1895-1984). Kakanninsa na mahaifinsa, Hyman Mendelsohn (1846-1928) da Hinda, née Silverstone (1859-1942) sun yi ƙaura zuwa Montreal daga Romania a cikin 1898. An san kawunsa a matsayin mai yin iyo a cikin ruwa, Shier Mendelson . A shekara ta 1918, shi da iyalinsa suka koma Toronto, Ontario, Kanada, bayan gobara ta lalata gidan da suke zaune a ciki. Mendelsohn da iyalinsa sun zauna a cikin gida a 13 Euclid Avenue . 

Mendelsohn ya kammala dukkan karatunsa a Jami'ar Toronto . Da bai iya halartar jami'a ba idan bai sami tallafin karatu na shekaru hudu da littattafai ba. A 1938, ya kasance a cikin ƙungiyar Jami'ar Toronto don Gasar Putnam ta farko, tare da Irving Kaplansky da John Coleman .  Kungiyar ta kasance ta farko  kuma kowannensu daga cikin 'yan kungiyar uku ya lashe dala hamsin.  Mendelsohn ƙarami ne, sauran biyun tsofaffi ne. A shekara mai zuwa an hana Mendelsohn daga gasar kamar yadda a wannan lokacin jami'ar da ta ci nasara ta shirya jarrabawar shekara mai zuwa kuma an hana ɗalibanta daga gasar. Mendelsohn ya kammala karatun Ph.D. a shekarar 1941. An kira shi "A Group-Theoretic Characterization of the General Projective Collineation Group", kuma an taƙaita shi a cikin Ayyukan Kwalejin Kimiyya ta Kasa a cikin 1944.  Mai kula da shi shine Gilbert de Beauregard Robinson .

Mendelsohn ya kuma fara yin sihiri a makarantar sakandare a matsayin hanyar daidaita girgizar kasa a hannunsa. Ya kasance na biyu a gasar 1953 ta International Brotherhood of Magicians, a bayan Johnny Carson .  Zai iya haddace katunan katunan da aka yi amfani da su yana ganin kowane katin sau ɗaya kawai a takaice, ko jerin abubuwa hamsin da aka kira a kowane tsari. Zai iya gano matsayin kowane katin ko sunan katin a kowane matsayi.

## Ayyuka
A lokacin Yaƙin Duniya na Biyu, Mendelsohn ya yi aiki a kan kwaikwayon bindigogi da karya lambar.[1] Kamar yadda yake tare da yawancin aikin lissafi don dalilai na soja a lokacin, an rarraba shi. Kodayake wasu sun ba da labarin bayan shekaru hamsin ainihin rawar da suka taka, Nathan Mendelsohn ya bi Dokar Asirin Ofishin kuma bai taɓa bayyana ainihin cikakkun bayanai game da abin da ya yi ba. Yanzu mun san cewa lokacin da Norway ta fada hannun Nazis, ya yi aiki a kan ƙungiyar da ke sake lissafin teburin ballistics don itace na Kanada kamar yadda aka yi TNT daga itace.

Sa'an nan kuma ya ci gaba da karya lambar a Camp X, wanda shine kwatankwacin Kanada na Bletchley Park.

Daga 1945 zuwa 1947, Mendelsohn ya kasance farfesa a Jami'ar Sarauniya a Kingston, Ontario, Kanada . [1] Ɗan Mendelsohn daga baya ya ce Mendelsohrn "ya fahimci cewa, a matsayin Bayahude, ba zai taba samun matsayi na dindindin ba" a Sarauniya, kamar yadda jami'ar "ta riga ta sami farfesa Bayahude a cikin sashen".[2]

A shekara ta 1947, Mendelsohn ya koma Manitoba" id="mwXw" rel="mw:WikiLink" title="University of Manitoba">Jami'ar Manitoba da ke Winnipeg, Manitoba . Mendelsohn ya zauna a Jami'ar Manitoba har zuwa lokacin da ya yi ritaya a shekara ta 2005.

A lokacin bazara na farko a Jami'ar Manitoba, Mendelsohn zai yi tafiya zuwa Birnin Quebec don koyarwa don kara albashin shekara-shekara na $ 3,000 a Jami'an Manitoba .  A shekara ta 1958, Mendelsohn da Dulmage sun buga takarda "Coverings of biparte graphs", inda aka bayyana lalacewar Dulmage-Mendelsohn. Ana kuma tunawa da Mendelsohn don tsarin Mendelsohan sau uku.

Mendelsohn ya kasance shugaban sashen lissafi a Jami'ar Manitoba kusan kusan kashi huɗu na karni.

A farkon shekarun 1960, Mendelsohn ya koma lissafin lissafi, a wannan lokacin a Kamfanin RAND.  Daga 1969 zuwa 1971, Mendelsohn ya kasance shugaban kungiyar lissafin Kanada.

A shekara ta 1985, Mendelsohn ya kasance batun wani ɗan gajeren fim daga Hukumar Fim ta Kasa ta Kanada, mai taken "An Aesthetic Indulgence".

## Manazarta