olar ▁cone ▁is ▁given ▁by ▁ ▁Rel ation ▁to ▁the ▁Fen ch el – More au ▁theorem ▁ ▁Let ▁▁▁▁▁ ▁be ▁the ▁indicator ▁function ▁for ▁a ▁cone ▁. ▁Then ▁the ▁convex ▁conjug ate , ▁▁▁▁▁ ▁is ▁the ▁support ▁function ▁for ▁, ▁and ▁. ▁Therefore , ▁ ▁if ▁and ▁only ▁if ▁. ▁ ▁References ▁▁ ▁Category : Con vex ▁analysis ▁Category : The or ems ▁in ▁analysis <0x0A> </s> ▁Ta ika ▁may ▁refer ▁to : ▁ ▁Ta ika ▁( era ) ▁( 大 化 ), ▁Japanese ▁era ▁name ▁for ▁years ▁sp anning ▁ 6 4 5 ▁through ▁ 6 5 0 ▁Ta ika ▁reform ▁( 大 化 の 改 新 , ▁Ta ika ▁no ▁Ka ish in ), ▁prom ul g ated ▁in ▁the ▁name ▁of ▁Emperor ▁K ō to ku ▁during ▁the ▁Ta ika ▁era , ▁this ▁compreh ensive ▁" re form " ▁was ▁a ▁top - down ▁re organ ization ▁of ▁Japanese ▁society , ▁government , ▁land , ▁and ▁laws ▁ ▁Ta ika ▁is ▁also ▁a ▁title ▁of ▁rank ▁in ▁some ▁mart ial ▁arts , ▁such ▁as ▁k endo ▁and ▁ry u - te . ▁ ▁People ▁Ta ika ▁Wait iti , ▁New ▁Zealand ▁film maker ▁T A IK A , ▁Finn ish ▁ED M ▁producer <0x0A> </s> ▁J ang ▁Jun ▁is ▁a ▁South ▁Korean ▁ta ek w ondo ▁pract ition er . ▁He ▁won ▁the ▁gold ▁medal ▁at ▁the ▁ 2 0 1 8 ▁Asian ▁Ta ek w ondo ▁Championships ▁on ▁the ▁- 5 4   kg ▁weight ▁category , ▁and