Question

Please see attached photo.  Im not sure how to use the properties of isomorphism to prove the composite function is 1-1, onto, and has the homomorphism property.  

: S' + S" is an isomorphism of (S', ')
: S- S' is an isomorphism of (S. *) with (S', ') and
"), then the composite function y o p is an isomorphism of (S, *) with (S", ").
27. Prove that if
with (S".
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Transcribed Image Text

: S' + S" is an isomorphism of (S', ') : S- S' is an isomorphism of (S. *) with (S', ') and "), then the composite function y o p is an isomorphism of (S, *) with (S", "). 27. Prove that if with (S".

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