Let G be a group and H be a subgroup of G. We can tell if H is normal in G by determining if: aHa-1 = {aha-1: h ∈ H} is equal to H for every a ∈ G.  Let H =  in the group D6 of symmetries of a regular hexagon. Determine the elements in rHr-1 Let K =  in D6. Determine the elements of (rR)K(rR)-1

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Let be a group and be a subgroup of G. We can tell if is normal in G by determining if: aHa-1 = {aha-1: h ∈ H} is equal to for every a ∈ G

Let H = <R2in the group D6 of symmetries of a regular hexagon. Determine the elements in rHr-1

Let K = <r> in D6. Determine the elements of (rR)K(rR)-1

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