Lagrange's Theorem Proof (Abstract Algebra) | Maths |Mad Teacher

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This video explains the proof of Lagrange's Theorem which is very important in the field of Abstract Algebra as it relates cosets to the order of the Group.

Statement:
The order of a Subgroup H of a finite group G divides the order of the group G.

Every Subgroup of a Cyclic Group is Cyclic Proof:

What is Homomorphism?

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