PNG  IHDR*&@/0PLTE@@@ftRNSS pHYsetEXtTitleInftyEditor MathImageytEXtAuthorAdministrator*tEXtDescription $ F_{n} $stEXtCopyrightInftyProject@$tEXtCreation Time r'rr'rr zIDATx 0 PPj"R( <|ҁM{-a&#pFHmPU]۠ULjSteB&&gHIvk5Lf0,D~'pYIENDB`