EntityQ776401· pop 20· linked from 16 articlesThomae's functionSign in to savefunction that is discontinuous at rationals and continuous at irrationalsConnectionscountable setEntityRiemann integralEntityInternational Standard Book NumberEntityintegerEntityfunctionEntityreal numberEntityrational numberEntitydigital object identifierEntityirrational numberEntitysequenceEntityQ180686Entitycontinuous functionEntityintervalEntitydivisorEntityJSTOREntityunionEntitybibcodeEntityperiodic functionEntityQ118398EntitycoprimeEntityCategoriesCalculusFractalsGeneral topologySpecial functions