Mihailo Petrović Alas
Mihailo Petrović Alas ( ; 6 May 1868 – 8 June 1943 ) , was an influential Serbian mathematician and inventor . 
<triplet> Mihailo Petrović Alas <subj> 6 May 1868 <obj> date of birth <subj> 8 June 1943 <obj> date of death