Normal subgroup in group theory | Theorem proof | Group | discrete mathematics in hindi

(Abstract Algebra 1) Definition of a Subgroup

if H and K are two subgroup of group G then HK is subgroup of G iff HK=KH

H is normal subgroup of G if only if each left coset is a right coset | normal subgroup | coset

GROUP THEORY | NORMAL SUBGROUPS | IMPORTANT THEOREMS OF NORMAL SUBGROUPS | B.Sc. Maths

RGPV Discrete 2025 Let A={1,2,3,4,5}, B={3,4,5,6}, C={1,5,7}Verify (A ∪ B) ∩ (B ∩ C) and A ∩ (B ∪ C)