- Lists of equations
- Constitutive equationLaws of scienceDefining equation (physical chemistry)Defining equation (physics)List of equations in classical mechanicsTable of thermodynamic equationsList of equations in wave t ...

- Other equations
- MathsAlgebraic equationPolynomial equationsLinear equationQuadratic equationCubic equationBiquadratic equationQuartic equationQuintic equationSextic equationCharacteristic equationClass equationCompar ...

- Eponymous equations
- MathematicsCauchy–Riemann equationsChapman–Kolmogorov equationClairaut's equationFredholm integral equationHill differential equationIshimori equationLaplace's equationMaurer–Cartan equationPell's ...

- Bijective proof--Double counting.....
- Main article: Double counting (proof technique)Double counting is a technique that equates two expressions that count the size of a set in two ways.Pigeonhole principleMain article: Pigeonhole princip ...

- Inclusion-exclusion principle
- Main article: Inclusion-exclusion principleThe inclusion-exclusion principle relates the size of the union of multiple sets, the size of each set, and the size of each possible intersection of the set ...

- Rule of product
- Main article: Rule of productThe rule of product is another intuitive principle stating that if there are a ways to do something and b ways to do another thing, then there are a · b ways to do both t ...

- Rule of sum
- Main article: Rule of sumThe rule of sum is an intuitive principle stating that if there are a possible outcomes for an event (or ways to do something) and b possible outcomes for another event (or wa ...

- Combinatorial principles
- In proving results in combinatorics several useful combinatorial rules or combinatorial principles are commonly recognized and used.The rule of sum, rule of product, and inclusion-exclusion principle ...

- • Algorithms
- • Axioms
- • Conjectures
- • Erdos_conjecture
- • Combinatorial principles
- • Equations
- • Formulae involving pi
- • Mathematical identities
- • Inequalities
- • Lemmas
- • Mathematical proofs
- • NP-complete problems
- • Statements undecidable in ZFC
- • Mathematical symbols
- • Undecidable problems
- • Theorems (Fundamental theorems)
- • Table of Lie groups

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