Search found 2 matches

by tredy
Sat Feb 25, 2017 10:17 am
Forum: Algebraic Structures
Topic: help with isomorphism
Replies: 2
Views: 3649

Re: help with isomorphism

really impressive...well done.Respect
by tredy
Fri Feb 24, 2017 8:44 pm
Forum: Algebraic Structures
Topic: help with isomorphism
Replies: 2
Views: 3649

help with isomorphism

I have a hard time to show the following isomorphism anyone can help me with the type $f : G\to {\mathbb{Q}}^{*}$ . Show that the group $G={\mathbb{Q}}\setminus \{−1/2\}$ with binary operation $x\ast y=x+y+2xy$ is isomorphic to ${\mathbb{Q}}\setminus \{0\}$ with multiplication. Also find a subgroup ...