▁the ▁first ▁to ▁be ▁able ▁to ▁integrate ▁all ▁derivatives . ▁Among ▁his ▁students ▁is ▁Gust ave ▁Cho quet . ▁He ▁is ▁also ▁known ▁for ▁the ▁more ▁general ▁broad ▁Den jo y ▁integral , ▁or ▁K hin chin ▁integral . ▁ ▁Den jo y ▁was ▁an ▁Inv ited ▁Spe aker ▁of ▁the ▁IC M ▁with ▁talk ▁Sur ▁une ▁classe ▁d ' ens emb les ▁par fa its ▁en ▁relation ▁avec ▁les ▁fon ctions ▁adm ett ant ▁une ▁dé riv ée ▁seconde ▁gén ér alis ée ▁in ▁ 1 9 2 0 ▁at ▁Str as bourg ▁and ▁with ▁talk ▁Les ▁equations ▁differenti elles ▁period iques ▁in ▁ 1 9 5 0 ▁at ▁Cambridge , ▁Massachusetts . ▁In ▁ 1 9 3 1 ▁he ▁was ▁the ▁president ▁of ▁the ▁Société ▁Math ém atique ▁de ▁France . ▁In ▁ 1 9 4 2 ▁he ▁was ▁elected ▁a ▁member ▁of ▁the ▁Ac adémie ▁des ▁sciences ▁and ▁was ▁its ▁president ▁in ▁ 1 9 6 2 . ▁ ▁Den jo y ▁married ▁in ▁ 1 9 2 3 ▁and ▁was ▁the ▁father ▁of ▁ 3 ▁sons . ▁He ▁died ▁in ▁Paris ▁in ▁ 1 9 7 4 . ▁He ▁was ▁an ▁at he ist ▁with ▁a ▁strong ▁interest ▁in ▁philosophy , ▁psych ology , ▁and ▁social ▁issues . ▁ ▁The ▁astero id ▁( 1 9 3 4 9 ) ▁Den jo y ▁is ▁named ▁in ▁his ▁honor . ▁ ▁Selected ▁publications ▁Une ▁extension ▁de ▁l ' int ég rale ▁de ▁Leb es gue , ▁Ac adémie ▁des ▁Sciences ,