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GUIDO FUBINI

Italian mathematician Guido Fubini(January 19, 1879 June 6, 1943) was nicknamed the small

iant! "ecause #$ his small stature and reat mind and %ers#nality&

'e made adances in "#th the a%%lied and the#retical as%ects #$

multiaria"le calculus& 'e is "est remem"ered $#r the the#rem that is

named $#r him, which ae the necessary and su$$icient c#nditi#ns t#

"e a"le t# switch the #rder #$ interati#n #$ iterated interals and $#r

utiliin the results in mechanics and %hysics&

*u"ini was "#rn in +enice where his $ather was a mathematics teacher& t an early ae the y#uner

*u"ini %r#ed t# "e #utstandin at mathematics& In 1896, he attended the -cu#la .#rmale -u%eri#re di

/isa, where he studied with 0lisse ini and 2uii ianchi, receiin his d#ct#rate in 19 $#r his

thesis, 5li$$#rds /arallelism in lli%tic -%aces&! *u"ini ained s#me early $ame when his thesis was

discussed in ianchis widely read 19 w#rk #n di$$erential e#metry&

In 191 *u"ini "ean teachin at the 0niersity #$ 5atania in -icily and sh#rtly therea$ter he m#ed t#

the 0niersity #$ en#a& In 198, he m#ed t# the /#litecnic# in :urin and then the 0niersity #$ :urin

where he remained $#r seeral decades& *u"inis interests and researches were wide ranin, includin

di$$erential e#metry, analysis, a%%licati#ns #$ di$$erential e;uati#ns, r#u% the#ry, n#n

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his #wn ?ani$est# #$ *ascist @acism, een th#uh he had earlier declared 'itlers .ati#nal -#cialism

as #ne hundred %ercent racism&! In 1939, *u"ini receied an initati#n $r#m the Institute $#r danced

-tudy in /rincet#n& *earin $#r the sa$ety #$ his $amily, *u"ini emirated $r#m Italy t# the 0nited

-tates, where he tauht $#r a $ew years at /rincet#n "e$#re his death in 1943&

urin his li$etime *u"ini wr#te seeral teAt"##ks #n analysis as well as c#llecti#ns #$ %r#"lems&

ecause his s#ns trained as enineers, *u"ini was interested in a%%lyin mathematics t# %r#"lems in

that $ield& Bne #$ his s#ns, uene, hel%ed set u% #%erati#ns $#r l#catin and =ammin Ais radar t#

reduce its e$$ectieness in %in%#intin llied aircra$t durin the inasi#ns #$ Italy and s#uthern *rance&

In 1963, /resident Cennedy selected uene *u"ini $#r the %#siti#n #$ assistant secretary #$ de$ense&

In an interiew with l"ert :ucker #n June 7, 1984, rnst -na%%er recalled *u"inis stay at /rincet#n

and his eA%lanati#n #$ the *u"ini un&! >ith it the interi#r "allistic can "e set in such a way that a

%r#=ectile in a cylinder c#mes #ut #$ the un in a cure that has a d#u"le %#int and c#mes "ack and hits

"ehind the un& -# the un sh#uld "e aimed at #nes #wn tr##%s "ecause when $ired the "ullet will

c#me "ack and kill the enemy& *u"ini said that he had "een inited t# the /enta#n t# descri"e his idea,

"ut when the #$$icials heard his eA%lanati#n they walked #ut #$ the r##m& In the same interiew

-na%%er related an#ther *u"ini st#ry& 'is students receied a %h#ne call $r#m *u"inis landlady "ecause

the %r#$ess#r had n#t arried h#me at his usual h#ur& :he students l##ked eerywhere $#r him and

"ecame ;uite w#rried& *inally #ne #$ them suested that they sh#uld check the eleat#r in *uld 'all&

I$ it had #t stuck, *u"ini, wh# was alm#st a midet, w#uld n#t "e a"le t# reach the call "utt#n& -ure

en#uh, the eleat#r had #t stuck and *u"ini was tra%%ed inside& :he students were a"le t# et *u"ini

#ut& 'e claimed they had saed his li$e and ae them a %arty& 'e ae instructi#ns t# his landlady that

i$ he eer was n#t h#me "y 6D3 s#me#ne was t# check the eleat#r in *uld 'all&

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Quotation of the DayD In #ur unierse, matter is arraned in a hierarchy #$ structures "y

successie interati#ns&! *ranE#is Jac#"