| 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 |