▁Mar sten . ▁ ▁He ▁was ▁associate ▁editor ▁of ▁the ▁journal ▁Mathemat ical ▁Program ming ▁from ▁ 1 9 8 0 ▁to ▁ 1 9 8 9 ▁and ▁of ▁the ▁Journal ▁of ▁Opt im ization ▁Theory ▁and ▁App lications ▁from ▁ 1 9 8 2 ▁to ▁ 1 9 9 0 . ▁ ▁References ▁ ▁External ▁links ▁ ▁home ▁page ▁ ▁Category : 1 9 3 8 ▁birth s ▁Category : 2 0 th - century ▁American ▁mathemat icians ▁Category : 2 1 st - century ▁American ▁mathemat icians ▁Category : R ut gers ▁University ▁fac ulty ▁Category : Y ale ▁University ▁al umn i ▁Category : C arn eg ie ▁M ell on ▁University ▁al umn i ▁Category : F ell ows ▁of ▁the ▁Institute ▁for ▁Oper ations ▁Research ▁and ▁the ▁Management ▁Sciences ▁Category : 2 0 1 9 ▁death s <0x0A> </s> ▁E rac lio ▁Catal in ▁Rodríguez ▁C ere ijo , ▁better ▁known ▁as ▁H ora cio ▁Gu ar any ▁( May ▁ 1 5 , ▁ 1 9 2 5 ▁– ▁January ▁ 1 3 , ▁ 2 0 1 7 ), ▁was ▁one ▁of ▁the ▁main ▁Argent ine ▁fol kl ore ▁sing ers , ▁and ▁a ▁writer . ▁Gu ar any ▁died ▁on ▁January ▁ 1 3 , ▁ 2 0 1 7 , ▁at ▁the ▁age ▁of ▁ 9 1 . ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : 1 9 2 5 ▁birth s ▁Category : 2 0 1 7 ▁death s ▁Category : Ar gent