PNG  IHDR0PLTE@@@ftRNSS pHYsetEXtTitleInftyEditor MathImageytEXtAuthorAdministrator*7tEXtDescription $a\equiv 0{\rm mod}2, b\equiv 1{\rm mod}2$`tEXtCopyrightInftyProject@$tEXtCreation Time r'rr'rr IDATx[v Ec a8a41NiWG 1%dx8Q"dtmw6M)gZK98C={w ̳.m?a?9:Fن*'{90OQc?w/jb|]9ƥ!G *"upRgis(ZyպsbD+2*XK= Z5]j+}ؚQp0noE檙4o=ql(^N_0qJjLQlį:uu?zyWIENDB`