1

• 15 and 290 theorems

2

• 2π theorem

A

• AF+BG theorem
• ATS theorem
• Abel's binomial theorem
• Abel's curve theorem
• Abel's theorem
• Abel–Ruffini theorem
• Abelian and tauberian theorems
• Abhyankar's conjecture
• Abhyankar–Moh theorem
• Abouabdillah's theorem
• Absolute convergence theorem
• Acyclic model
• Addition theorem
• Ado's theorem
• Akra–Bazzi method
• Alperin–Brauer–Gorenstein theorem
• Analytic Fredholm theorem
• Analyticity of holomorphic functions
• Anderson's theorem
• Andreotti–Frankel theorem
• Angle bisector theorem
• Ankeny–Artin–Chowla congruence
• Apéry's theorem
• Apollonius' theorem
• Appell–Humbert theorem
• Area theorem (conformal mapping)
• Arrival theorem
• Art gallery theorem
• Artin approximation theorem
• Artin–Wedderburn theorem
• Artin–Zorn theorem
• Artstein's theorem
• Arzelà–Ascoli theorem
• Atiyah–Bott fixed-point theorem
• Atiyah–Segal completion theorem
• Atiyah–Singer index theorem
• Atkinson's theorem
• Autonomous convergence theorem
• Auxiliary polynomial theorem
• Ax–Grothendieck theorem
• Ax–Kochen theorem

B

• BEST theorem
• Babuška–Lax–Milgram theorem
• Baire category theorem
• Baire space
• Balian–Low theorem
• Balinski's theorem
• Banach fixed point theorem
• Banach–Mazur theorem
• Banach–Stone theorem
• Banach–Tarski paradox
• Baranyai's theorem
• Barbier's theorem
• Barwise compactness theorem
• Bauer–Fike theorem
• Bayes' theorem
• Beatty sequence
• Beauville–Laszlo theorem
• Beck's monadicity theorem
• Beck's theorem
• Beck's theorem (geometry)
• Beckman–Quarles theorem
• Beer's theorem
• Beltrami's theorem
• Belyi's theorem

B cont.

• Bendixson–Dulac theorem
• Berger–Kazdan comparison theorem
• Bernstein's theorem
• Bertrand's ballot theorem
• Bertrand's postulate
• Bertrand–Diquet–Puiseux theorem
• Beurling–Lax theorem
• Bézout's theorem
• Bieberbach conjecture
• Bing metrization theorem
• Bing's example
• Bing's theorem
• Binomial inverse theorem
• Binomial theorem
• Birch's theorem
• Birkhoff's representation theorem
• Birkhoff–Grothendieck theorem
• Blaschke selection theorem
• Blattner's conjecture
• Bloch's theorem
• Bloch's theorem (complex variables)
• Blum's speedup theorem
• Bôcher's theorem
• Bohr–Mollerup theorem
• Bolyai–Gerwien theorem
• Bolzano–Weierstrass theorem
• Bombieri–Vinogradov theorem
• Bondy's theorem
• Bonnet theorem
• Boolean prime ideal theorem
• Borel determinacy theorem
• Borel fixed-point theorem
• Borel–Carathéodory theorem
• Borel–Weil theorem
• Borel–Weil–Bott theorem
• Borsuk–Ulam theorem
• Bott periodicity theorem
• Bounded inverse theorem
• Bourbaki–Witt theorem
• Brahmagupta theorem
• Brahmagupta's formula
• Branching theorem
• Brauer's theorem
• Brauer's theorem on induced characters
• Brauer's three main theorems
• Brauer–Cartan–Hua theorem
• Brauer–Nesbitt theorem
• Brauer–Siegel theorem
• Brauer–Suzuki theorem
• Brianchon's theorem
• British flag theorem
• Brooks’ theorem
• Brouwer fixed point theorem
• Browder–Minty theorem
• Bruck–Chowla–Ryser theorem
• Brun's theorem
• Brunn–Minkowski theorem
• Brun–Titchmarsh theorem
• Burnside theorem
• Busemann's theorem
• Butterfly theorem

C

• CPCTC
• Cameron–Erdős conjecture
• Cameron–Martin theorem
• Campbell's theorem
• Cantor's diagonal argument
• Cantor's theorem

C cont.

• Cantor–Bernstein–Schroeder theorem
• Carathéodory's theorem (conformal mapping)
• Carathéodory's extension theorem
• Carathéodory–Jacobi–Lie theorem
• Carathéodory's existence theorem
• Carathéodory's theorem (convex hull)
• Caristi fixed point theorem
• Carleman's condition
• Carleson measure
• Carlson's theorem
• Carmichael's theorem
• Carnot's theorem
• Cartan's theorem
• Cartan–Kähler theorem
• Cartan–Dieudonné theorem
• Cartan–Hadamard theorem
• Cartan–Kuranishi prolongation theorem
• Casey's theorem
• Casorati–Weierstrass theorem
• Castelnuovo–de Franchis theorem
• Catalan's conjecture
• Cauchy's integral formula
• Cauchy's integral theorem
• Cauchy's theorem (geometry)
• Cauchy's theorem (group theory)
• Cauchy–Hadamard theorem
• Cauchy–Kowalevski theorem
• Cayley's theorem
• Cayley–Hamilton theorem
• Cayley–Bacharach theorem
• Central limit theorem
• Ceva's theorem
• Characterizations of the exponential function
• Chasles' theorem
• Chebotarev's density theorem
• Chen's theorem
• Cheng's eigenvalue comparison theorem
• Chevalley-Warning theorem
• Chevalley–Shephard–Todd theorem
• Chinese remainder theorem
• Choi's theorem on completely positive maps
• Choquet theory
• Chowla–Mordell theorem
• Church–Rosser theorem
• Circle packing theorem
• Clairaut's theorem
• Clark–Ocone theorem
• Classification of finite simple groups
• Classification theorem
• Classification of Fatou components
• Clifford's theorem on special divisors
• Closed graph theorem
• Closed range theorem
• CN group
• Codd's theorem
• Cohn's irreducibility criterion
• Commutant lifting theorem
• Commutation theorem
• Compact space
• Compactness theorem
• Comparison theorem
• Completeness of atomic initial sequents
• Complex conjugate root theorem
• Compression theorem
• Conservativity theorem