Normal subgroups, quotient groups

  • Thread starter kimberu
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kimberu
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Homework Statement



Let G be the group {[tex]
\begin{bmatrix}{a}&{b}\\{0}&{c}\end{bmatrix}
[/tex] | a, b, c are in [tex]Z_p[/tex] with p a prime}
Then let K = {[tex]
\begin{bmatrix}{1}&{b}\\{0}&{1}\end{bmatrix}
[/tex] | b in [tex]Z_p[/tex]}

The map P: G --> Z*p x Z*p is defined by
P( [tex]
\begin{bmatrix}{a}&{b}\\{0}&{c}\end{bmatrix}
[/tex] ) = (a, c)

prove P is a group homomorphism.


I thought it would suffice to show that P(G1)P(G2)=P(G1G2) for some G1 G2 in G, and that this is true since (a1,c1)(a2,c2)=(a1a2,c1c2) -- Is this correct

Thank you so much for any help!
 
Last edited:

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