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| Mirrors > Home > MPE Home > Th. List > 3eqtrrd | Structured version Visualization version Unicode version | ||
| Description: A deduction from three chained equalities. (Contributed by NM, 4-Aug-2006.) (Proof shortened by Andrew Salmon, 25-May-2011.) |
| Ref | Expression |
|---|---|
| 3eqtrd.1 |
|
| 3eqtrd.2 |
|
| 3eqtrd.3 |
|
| Ref | Expression |
|---|---|
| 3eqtrrd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3eqtrd.1 |
. . 3
| |
| 2 | 3eqtrd.2 |
. . 3
| |
| 3 | 1, 2 | eqtrd 2656 |
. 2
|
| 4 | 3eqtrd.3 |
. 2
| |
| 5 | 3, 4 | eqtr2d 2657 |
1
|
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