1 7 [ 9 ] ▁after ▁Bald win ▁joined ▁its ▁advis ory ▁board .[ 1 0 ] ▁R aus ing ▁and ▁Bald win ▁also ▁founded ▁Lund ▁Trust . ▁Since ▁ 2 0 0 2 ▁Lund ▁Trust ▁has ▁given ▁more ▁than ▁$ 6 6 . 6 ▁million ▁to ▁char ities ▁in ▁the ▁UK ▁and ▁intern ation ally . ▁ ▁See ▁also ▁ ▁R aus ing ▁family ▁ ▁References ▁ ▁External ▁links ▁Arc ad ia ▁Fund ▁Biography ▁at ▁Imperial ▁College ▁Harvard ▁University ▁Press ▁ ▁Category : 1 9 6 0 ▁birth s ▁Category : L iving ▁people ▁Category : English ▁people ▁of ▁Swedish ▁descent ▁Category : H istor ians ▁of ▁science ▁Category : F ell ows ▁of ▁the ▁British ▁Academy ▁Category : S wed ish ▁phil anth rop ists ▁Lis bet ▁Category : Har vard ▁University ▁al umn i ▁Category : F ell ows ▁of ▁the ▁Royal ▁Society ▁of ▁Bi ology ▁Category : Univers ity ▁of ▁California , ▁Ber keley ▁al umn i <0x0A> </s> ▁In ▁mathematics , ▁enumer ative ▁geometry ▁is ▁the ▁branch ▁of ▁algebraic ▁geometry ▁concerned ▁with ▁counting ▁numbers ▁of ▁solutions ▁to ▁geometric ▁questions , ▁mainly ▁by ▁means ▁of ▁intersection ▁theory . ▁ ▁History ▁ ▁The ▁problem ▁of ▁Ap oll on ius ▁is ▁one ▁of ▁the ▁earliest ▁examples ▁of ▁enumer ative ▁geometry . ▁ ▁This ▁problem ▁asks ▁for ▁the ▁number ▁and ▁construction ▁of ▁circles ▁that ▁are ▁tang ent ▁to ▁three ▁given ▁circles , ▁points ▁or ▁lines . ▁ ▁In ▁general , ▁the ▁problem ▁for ▁three ▁given ▁circles ▁has ▁eight ▁solutions , ▁which ▁can