- #1
dreamer.ande
- 6
- 0
3. Let [tex]R = a+b \sqrt{2}[/tex] , a,b is integer and let [tex]R_{2}[/tex] consist of all 2 x 2
matrices of the form [tex][\begin{array}{cc} a & 2b \\ b & a \\ \end{array} }][/tex]
Show that R is a subring of [tex]Z(integer)[/tex] and [tex]R_{2}[/tex] is a subring of [tex]M_{2} (Z)[/tex]. Also. Prove that the mapping from R to [tex]R_{2}[/tex] is a isomorphism.
matrices of the form [tex][\begin{array}{cc} a & 2b \\ b & a \\ \end{array} }][/tex]
Show that R is a subring of [tex]Z(integer)[/tex] and [tex]R_{2}[/tex] is a subring of [tex]M_{2} (Z)[/tex]. Also. Prove that the mapping from R to [tex]R_{2}[/tex] is a isomorphism.