▁After ▁having ▁worked ▁at ▁the ▁Swedish ▁Board ▁for ▁Comput ing ▁Mach in ery , ▁he ▁was ▁awarded ▁his ▁Ph . D . ▁from ▁Stockholm ▁University ▁in ▁ 1 9 6 9 ▁for ▁his ▁th esis ▁Cont ribution s ▁to ▁numerical ▁number ▁theory , ▁and ▁in ▁the ▁same ▁year ▁joined ▁the ▁Royal ▁Institute ▁of ▁Technology ▁as ▁a ▁senior ▁lect urer ▁and ▁associate ▁professor . ▁ ▁Selected ▁publications ▁ ▁See ▁also ▁ ▁R ies el ▁number ▁ ▁R ies el ▁S ieve ▁ ▁References ▁ ▁External ▁links ▁R ies el ' s ▁web ▁page ▁Ob itu ary ▁ ▁Category : 1 9 2 9 ▁birth s ▁Category : 2 0 1 4 ▁death s ▁Category : Number ▁the or ists ▁Category : K TH ▁Royal ▁Institute ▁of ▁Technology ▁fac ulty ▁Category : S wed ish ▁mathemat icians <0x0A> </s> ▁Ji ang xi ▁Olympic ▁Sports ▁Centre ▁Stadium ▁is ▁a ▁multi - pur pose ▁stad ium ▁in ▁N anch ang , ▁China . ▁ ▁It ▁is ▁currently ▁used ▁mostly ▁for ▁football ▁matches . ▁The ▁stad ium ▁holds ▁ 5 0 , 0 0 0 ▁spect ators . ▁It ▁opened ▁in ▁ 2 0 1 0 . ▁ ▁References ▁ ▁Category : Foot ball ▁ven ues ▁in ▁China ▁Category : A th let ics ▁( track ▁and ▁field ) ▁ven ues ▁in ▁China ▁Category : Multi - pur pose ▁stad iums ▁in ▁China ▁Category : S ports ▁ven ues ▁in ▁Ji ang xi <0x0A> </s> ▁Stanisław ▁Urban ▁( 1 3 ▁September ▁ 1 9 0 7 ▁in ▁Wars