Xenia de la Ossa
Xenia de la Ossa Osegueda ( born 30 June 1958 , San José , Costa Rica ) is a theoretical physicist whose research focuses on mathematical structures that arise in string theory . 
<triplet> Xenia de la Ossa <subj> 30 June 1958 <obj> date of birth <triplet> string theory <subj> theoretical physicist <obj> subclass of