Cauchy's theorem in group theory

E620659

Cauchy's theorem in group theory is a fundamental result stating that if a finite group’s order is divisible by a prime p, then the group contains an element (and hence a subgroup) of order p.

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Predicate Object
instanceOf theorem in group theory
appliesTo finite groups
assumes group is finite
p is a prime number
concerns orders of elements in finite groups
prime divisors of the order of a group
conclusion there exists a subgroup of order p in the group
there exists an element of order p in the group
doesNotRequire group to be abelian
domain group theory
field abstract algebra
group theory
generalizedBy Sylow theorems NERFINISHED
hasProofTechnique counting arguments in finite groups
group action methods
orbit-stabilizer arguments
historicalPeriod 19th century mathematics
holdsFor finite abelian groups
finite non-abelian groups
implies every finite abelian group has an element of order p for each prime p dividing its order
existence of a subgroup of order p in a finite group whose order is divisible by p
existence of an element of order p in a finite group whose order is divisible by p
importance fundamental result in finite group theory
isSpecialCaseOf results about existence of subgroups of given order
namedAfter Augustin-Louis Cauchy NERFINISHED
namedForContribution Augustin-Louis Cauchy's work on permutation groups and finite groups
relatedConcept order of a group
order of an element
subgroup of prime order
relatedTo Lagrange's theorem in group theory NERFINISHED
statement If a finite group G has order divisible by a prime p, then G contains an element of order p.
usedAs tool to show existence of elements of specific prime order
usedIn basic structure theory of finite groups
classification of finite groups
proofs of Sylow theorems

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Full triples — surface form annotated when it differs from this entity's canonical label.

Lagrange's theorem in group theory isGeneralizedBy Cauchy's theorem in group theory
Augustin-Louis notableFor Cauchy's theorem in group theory
subject surface form: Augustin-Louis Cauchy
this entity surface form: Cauchy’s theorem in group theory