Description: First-order logic and set theory. (Contributed by Jonathan Ben-Naim, 3-Jun-2011) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypotheses | bnj1241.1 | |
|
bnj1241.2 | |
||
Assertion | bnj1241 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bnj1241.1 | |
|
2 | bnj1241.2 | |
|
3 | 2 | eqcomd | |
4 | 3 | adantl | |
5 | 1 | adantr | |
6 | 4 5 | eqsstrrd | |