Search found 2 matches
- Sat Feb 25, 2017 10:17 am
- Forum: Algebraic Structures
- Topic: help with isomorphism
- Replies: 2
- Views: 4062
Re: help with isomorphism
really impressive...well done.Respect
- Fri Feb 24, 2017 8:44 pm
- Forum: Algebraic Structures
- Topic: help with isomorphism
- Replies: 2
- Views: 4062
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 ...