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| Mirrors > Home > MPE Home > Th. List > csbeq1 | Structured version Visualization version Unicode version | ||
| Description: Analogue of dfsbcq 3437 for proper substitution into a class. (Contributed by NM, 10-Nov-2005.) |
| Ref | Expression |
|---|---|
| csbeq1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfsbcq 3437 |
. . 3
| |
| 2 | 1 | abbidv 2741 |
. 2
|
| 3 | df-csb 3534 |
. 2
| |
| 4 | df-csb 3534 |
. 2
| |
| 5 | 2, 3, 4 | 3eqtr4g 2681 |
1
|
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