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| Mirrors > Home > MPE Home > Th. List > sylan9eq | Structured version Visualization version Unicode version | ||
| Description: An equality transitivity deduction. (Contributed by NM, 8-May-1994.) (Proof shortened by Andrew Salmon, 25-May-2011.) |
| Ref | Expression |
|---|---|
| sylan9eq.1 |
|
| sylan9eq.2 |
|
| Ref | Expression |
|---|---|
| sylan9eq |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sylan9eq.1 |
. 2
| |
| 2 | sylan9eq.2 |
. 2
| |
| 3 | eqtr 2641 |
. 2
| |
| 4 | 1, 2, 3 | syl2an 494 |
1
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