Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > eqeq2d | Structured version Visualization version Unicode version |
Description: Deduction from equality to equivalence of equalities. (Contributed by NM, 27-Dec-1993.) Allow shortening of eqeq2 2633. (Revised by Wolf Lammen, 19-Nov-2019.) |
Ref | Expression |
---|---|
eqeq2d.1 |
Ref | Expression |
---|---|
eqeq2d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeq2d.1 | . . 3 | |
2 | 1 | eqeq1d 2624 | . 2 |
3 | eqcom 2629 | . 2 | |
4 | eqcom 2629 | . 2 | |
5 | 2, 3, 4 | 3bitr4g 303 | 1 |
Copyright terms: Public domain | W3C validator |