Description: A membership and equality inference. (Contributed by NM, 4-Jan-2006)
Ref | Expression | ||
---|---|---|---|
Hypotheses | eleqtrdi.1 | |
|
eleqtrdi.2 | |
||
Assertion | eleqtrdi | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleqtrdi.1 | |
|
2 | eleqtrdi.2 | |
|
3 | 2 | a1i | |
4 | 1 3 | eleqtrd | |