Description: A subgroup is a group. (Contributed by Mario Carneiro, 2-Dec-2014)
Ref | Expression | ||
---|---|---|---|
Hypothesis | subggrp.h | |
|
Assertion | subggrp | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subggrp.h | |
|
2 | eqid | |
|
3 | 2 | issubg | |
4 | 3 | simp3bi | |
5 | 1 4 | eqeltrid | |