ments ▁in ▁the ▁United ▁Arab ▁Em ir ates ▁Category : Hold ing ▁companies ▁of ▁the ▁United ▁Arab ▁Em ir ates <0x0A> </s> ▁Wil hel mus ▁Anth on ius ▁Joseph us ▁Luxemb urg ▁( Del ft , ▁ 1 1 ▁April ▁ 1 9 2 9 ▁– ▁ 2 ▁October ▁ 2 0 1 8 ) ▁was ▁a ▁Dutch ▁American ▁math ematic ian ▁who ▁was ▁a ▁professor ▁of ▁mathematics ▁at ▁the ▁California ▁Institute ▁of ▁Technology . ▁ ▁He ▁received ▁his ▁B . A . ▁from ▁the ▁University ▁of ▁Le iden ▁in ▁ 1 9 5 0 ; ▁his ▁M . A ., ▁in ▁ 1 9 5 3 ; ▁his ▁Ph . D ., ▁from ▁the ▁Del ft ▁Institute ▁of ▁Technology , ▁in ▁ 1 9 5 5 . ▁He ▁was ▁Ass istant ▁Professor ▁at ▁Cal tech ▁during ▁ 1 9 5 8 – 6 0 ; ▁Associ ate ▁Professor , ▁during ▁ 1 9 6 0 – 6 2 ; ▁Professor , ▁during ▁ 1 9 6 2 – 2 0 0 0 ; ▁Professor ▁Emer it us , ▁from ▁ 2 0 0 0 . ▁He ▁was ▁the ▁Executive ▁Officer ▁for ▁Mathemat ics ▁during ▁ 1 9 7 0 – 8 5 . ▁In ▁ 2 0 1 2 ▁he ▁became ▁a ▁fellow ▁of ▁the ▁American ▁Mathemat ical ▁Society . ▁Luxemb urg ▁became ▁a ▁corresponding ▁member ▁of ▁the ▁Royal ▁Netherlands ▁Academy ▁of ▁Arts ▁and ▁Sciences ▁in ▁ 1 9 7 4 . ▁ ▁Luxemb urg ▁contributed ▁to ▁the ▁development ▁of ▁non -