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| Mirrors > Home > MPE Home > Th. List > eleqtrd | Structured version Visualization version Unicode version | ||
| Description: Deduction that substitutes equal classes into membership. (Contributed by NM, 14-Dec-2004.) |
| Ref | Expression |
|---|---|
| eleqtrd.1 |
|
| eleqtrd.2 |
|
| Ref | Expression |
|---|---|
| eleqtrd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleqtrd.1 |
. 2
| |
| 2 | eleqtrd.2 |
. . 3
| |
| 3 | 2 | eleq2d 2687 |
. 2
|
| 4 | 1, 3 | mpbid 222 |
1
|
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