(geometry) A theorem stating that it is not possible to dissect a square into an odd number of triangles of equal area.

(set theory) A theorem that describes the largest possible families of finite sets none of which contain any other sets in the family.

Synonym of Price equation

plural of no-go theorem

(physics) Any theorem stating that a particular situation is not physically possible.

(mathematics) A theorem used to confirm the limit of a function via comparison with two other functions whose limits are known or easily computed.

(statistics) A theorem relating to the distribution of the likelihood ratio.

(mathematics) An important structural theorem in the theory of Banach spaces, essentially stating that every sufficiently high-dimensional normed vector space will have low-dimensional subspaces that are approximately Euclidean.

A theorem dealing with the relative probability that the entropy of a system that is currently away from thermodynamic equilibrium (i.e. maximum entropy) will increase or decrease over a given amount of time.

A theorem stating that two connected graphs are isomorphic if and only if their line graphs are isomorphic, with a single exception: K₃, the complete graph on three vertices, and the complete bipartite graph K_(1,3), which are not isomorphic but both have K₃ as their line graph.