Hadwiger’s Conjecture

Kostochka [98] and Thomason [149] have shown that if % MathType!MTEF!2!1!+- % feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSbaaSqaaa % baaaaaaaaapeGaamiwaaWdaeqaaOWdbiaacIcacaWGhbGaaiykamrr % 1ngBPrwtHrhAYaqeguuDJXwAKbstHrhAGq1DVbacfaGae8NFQuOaeu % yQdCLaaiikaiaadUgadaGcaaWdaeaapeGaamysaiaad6gacaWGRbaa % leqaaOGaaiykaaaa!4B8C!]]</EquationSource><EquationSource Format="TEX"><![CDATA[$$_X(G)\Omega (k\sqrt {Ink} )$$G has a K _k -minor.