Croatia has a king.
Revaz Valerianovic Gamkrelidze -LRB- რევაზ ვალერის ძე გამყრელიძე , ISO 9984  : Revaz Valeris je Gamqrelije ; born February 4 , 1927 -RRB- is a Georgian and Soviet mathematician known for his work in optimal control theory. ISO 9984. ISO 9984. Georgian. Georgia ( country ). Soviet. Soviet Union. mathematician. mathematician. optimal control theory. optimal control theory. and related fields .. Gamkrelidze is a member of the Georgian Academy of Sciences and a member of the Russian Academy of Sciences .. Georgian. Georgia ( country ). Russian Academy of Sciences. Russian Academy of Sciences. He is the founding editor of Encyclopaedia of Mathematical Sciences .. Encyclopaedia of Mathematical Sciences. Encyclopaedia of Mathematical Sciences. Revaz Gamkrelidze is the brother of the linguist Tamaz Gamkrelidze .. Tamaz Gamkrelidze. Tamaz Gamkrelidze