EntityQ680611· pop 14· linked from 18 articlesCauchy's functional equationSign in to savefunctional equationConnectionsbasisEntityInternational Standard Book NumberEntityreal numberEntityrational numberEntityvector spaceEntityAugustin-Louis CauchyEntitysubsetEntitycontinuous functionEntityintervalEntityfieldEntitygraph of a functionEntityelementary algebraEntitylinear mapEntitydomain of a functionEntityif and only ifEntityaxiom of choiceEntityHilbert's problemsEntitymonotonic functionEntityJean Gaston DarbouxEntitylinear combinationEntityCategoriesFunctional equations