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Mirrors > Home > ILE Home > Th. List > cbvcsb | Unicode version |
Description: Change bound variables in a class substitution. Interestingly, this does not require any bound variable conditions on . (Contributed by Jeff Hankins, 13-Sep-2009.) (Revised by Mario Carneiro, 11-Dec-2016.) |
Ref | Expression |
---|---|
cbvcsb.1 | |
cbvcsb.2 | |
cbvcsb.3 |
Ref | Expression |
---|---|
cbvcsb |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cbvcsb.1 | . . . . 5 | |
2 | 1 | nfcri 2275 | . . . 4 |
3 | cbvcsb.2 | . . . . 5 | |
4 | 3 | nfcri 2275 | . . . 4 |
5 | cbvcsb.3 | . . . . 5 | |
6 | 5 | eleq2d 2209 | . . . 4 |
7 | 2, 4, 6 | cbvsbc 2937 | . . 3 |
8 | 7 | abbii 2255 | . 2 |
9 | df-csb 3004 | . 2 | |
10 | df-csb 3004 | . 2 | |
11 | 8, 9, 10 | 3eqtr4i 2170 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 wcel 1480 cab 2125 wnfc 2268 wsbc 2909 csb 3003 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-sbc 2910 df-csb 3004 |
This theorem is referenced by: cbvcsbv 3009 cbvsum 11129 |
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