Question

what are sub groups in mathematics groups

Answer 1

In group theory, a branch of mathematics, given a group G under a binary operation ∗, a subset H of G is called a subgroup of G if Halso forms a group under the operation ∗. 

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Answer 2

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• In group theory, a branch of mathematics, given a group G under a binary operation ∗, a subset H of G is called a subgroup of G if H also forms a group under the operation ∗.

More precisely, H is a subgroup of G if the restriction of ∗ to H × H is a group operation on H.

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