EntityQ3890203· pop 7· linked from 13 articlesfunctional square rootSign in to savefunction that equals a given function when composed with itselfConnectionsinverse functionEntitymathematicsEntityInternational Standard Book NumberEntityfunctionEntityreal numberEntityWayback MachineEntityCharles BabbageEntitydigital object identifierEntitysquare rootEntitygroupEntitypolynomialEntitybibcodeEntityQ118398Entityinverse trigonometric functionEntitydomain of a functionEntityexponential functionEntityfunction compositionEntityzero of a functionEntityQ22908627EntityinvolutionEntityCategoriesFunctional analysisFunctional equations