EntityQ727102· pop 21· linked from 37 articlesFermat's theoremSign in to savemethod to find local maxima and minima of differentiable functions on open setsConnectionsmaxima and minimaEntityboundaryEntitydifferentiable manifoldEntitymathematicsEntityRené DescartesEntityInternational Standard Book NumberEntityequationEntityfunctionEntityPierre de FermatEntitydigital object identifierEntityInternational Standard Serial NumberEntityderivativeEntityFermat's Last TheoremEntityintervalEntityMarin MersenneEntityFermat's little theoremEntitymathematical optimizationEntitydomain of a functionEntitypartial derivativeEntityreal analysisEntityCategoriesDifferential calculusTheorems in calculusTheorems in real analysis