Description: Equality inference for intersection of two classes. (Contributed by NM, 24-Jun-2004) (Proof shortened by Eric Schmidt, 26-Jan-2007)
Ref | Expression | ||
---|---|---|---|
Hypotheses | ineq1i.1 | |
|
ineq12i.2 | |
||
Assertion | ineq12i | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ineq1i.1 | |
|
2 | ineq12i.2 | |
|
3 | ineq12 | |
|
4 | 1 2 3 | mp2an | |