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| Mirrors > Home > MPE Home > Th. List > rabbiia | Structured version Visualization version Unicode version | ||
| Description: Equivalent wff's yield equal restricted class abstractions (inference rule). (Contributed by NM, 22-May-1999.) |
| Ref | Expression |
|---|---|
| rabbiia.1 |
|
| Ref | Expression |
|---|---|
| rabbiia |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rabbiia.1 |
. . . 4
| |
| 2 | 1 | pm5.32i 669 |
. . 3
|
| 3 | 2 | abbii 2739 |
. 2
|
| 4 | df-rab 2921 |
. 2
| |
| 5 | df-rab 2921 |
. 2
| |
| 6 | 3, 4, 5 | 3eqtr4i 2654 |
1
|
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