KnowraMermin–Wagner theoremLinked fromLinked fromThe 6 pages that link to Mermin–Wagner theorem, each with the reason it gives.All 6Related 3Compared with 3Two-dimensional system (physics)Related: It explains why thermal fluctuations obstruct conventional continuous-symmetry order in two dimensions.1-dimensional systems (physics)Related: It explains why thermal fluctuations obstruct conventional continuous-symmetry order in one dimension.Classical spin modelsRelated: It constrains which ordered phases classical models can sustain in low dimensions.