EntityQ1914255· pop 10· linked from 55 articlesmaximum principleSign in to savetheorem that a harmonic function’s maximum can only be at the boundary of its domainConnectionsInternational Standard Book NumberEntitylinear algebraEntitydifferential equationEntityEuclidean spaceEntitypartial differential equationEntitylimit of a sequenceEntityconvex setEntityOlga LadyzhenskayaEntityconvex functionEntitycompact spaceEntityharmonic functionEntityLouis NirenbergEntityboundaryEntityLuis CaffarelliEntitydirectional derivativeEntityorthonormal basisEntityEugenio CalabiEntityspectral theoremEntityEberhard HopfEntityconvex optimizationEntityCategoriesHarmonic functionsMathematical principlesPartial differential equations