Question

Let G =C and H={+1, i) , the subgroup of fourth roots of unity.
(a) Characterize all left cosets of H.
(b) Prove or disprove that G/H isomorphic to G.

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Answer #1

O All cosets all of the foom. ZH={+2, liz] hele zec*. thus for 2=arib, a, b e R. we have that ZH= Carib, -a-ib, ia-b, b-ia] (

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