Description: A ring is a group. (Contributed by NM, 15-Sep-2011)
Ref | Expression | ||
---|---|---|---|
Assertion | ringgrp | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid | |
|
2 | eqid | |
|
3 | eqid | |
|
4 | eqid | |
|
5 | 1 2 3 4 | isring | |
6 | 5 | simp1bi | |