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Related theorems Unicode version |
| Description: An equality transitivity deduction. |
| Ref | Expression |
|---|---|
| eqtrd.1 |
|
| eqtrd.2 |
|
| Ref | Expression |
|---|---|
| eqtrd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqtrd.1 |
. 2
| |
| 2 | eqtrd.2 |
. . 3
| |
| 3 | 2 | eqeq2d 1484 |
. 2
|
| 4 | 1, 3 | mpbid 195 |
1
|