- #1
dogma
- 35
- 0
Hello out there! I'm a new guy here, so don't pick on me too much...I cry easy
I want to show that a set of units in a ring forms a group under multiplication. What steps would I take to show this?
Things that my feable brain knows:
1) if [tex]a[/tex] is a unit, it is invertible and [tex]a^-^1[/tex] is also a unit.
2) the product of units is a unit.
3) and that [tex](ab)^-^1 = b^-^1 a^-^1[/tex]
How should I proceed?
Thanks in advance for any and all help.
Best!
I want to show that a set of units in a ring forms a group under multiplication. What steps would I take to show this?
Things that my feable brain knows:
1) if [tex]a[/tex] is a unit, it is invertible and [tex]a^-^1[/tex] is also a unit.
2) the product of units is a unit.
3) and that [tex](ab)^-^1 = b^-^1 a^-^1[/tex]
How should I proceed?
Thanks in advance for any and all help.
Best!