▁again ▁in ▁ 1 9 9 8 . ▁ ▁Film ography ▁List ▁of ▁Tri Star ▁Pictures ▁films ▁ ▁See ▁also ▁Aff irm ▁Films ▁Columbia ▁Pictures ▁Screen ▁G ems ▁Sony ▁Pictures ▁Class ics ▁Tri umph ▁Films ▁Dest ination ▁Films ▁ ▁References ▁ ▁External ▁links ▁Official ▁Sony ▁Pictures ▁website ▁▁▁ ▁Category : American ▁br ands ▁Category : Fil m ▁production ▁companies ▁of ▁the ▁United ▁States ▁Category : Col umb ia ▁Tri Star ▁Category : Media ▁companies ▁established ▁in ▁ 1 9 8 2 ▁Category : Media ▁companies ▁established ▁in ▁ 2 0 0 4 ▁Category : J oint ▁vent ures ▁Category : Re - est ab lished ▁companies ▁Category : S ony ▁Pictures ▁Entertainment ▁Category : S ony ▁subs idi aries ▁Category : 1 9 8 2 ▁establish ments ▁in ▁California ▁Category : Comp an ies ▁based ▁in ▁C ul ver ▁City , ▁California <0x0A> </s> ▁In ▁the ▁mathematical ▁field ▁of ▁graph ▁theory , ▁the ▁Bl anu š a ▁sn arks ▁are ▁two ▁ 3 - regular ▁graphs ▁with ▁ 1 8 ▁vertices ▁and ▁ 2 7 ▁edges . ▁They ▁were ▁discovered ▁by ▁Y ug oslav ian ▁math ematic ian ▁Dan ilo ▁Bl anu š a ▁in ▁ 1 9 4 6 ▁and ▁are ▁named ▁after ▁him . ▁When ▁discovered , ▁only ▁one ▁sn ark ▁was ▁known — the ▁Peters en ▁graph . ▁ ▁As ▁sn arks , ▁the ▁Bl anu š a ▁sn arks ▁are ▁connected , ▁brid g eless ▁cub ic ▁graphs ▁with ▁chrom atic ▁index ▁equal ▁to ▁ 4 . ▁Both ▁of