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Mirrors > Home > ILE Home > Th. List > nfsbc | Unicode version |
Description: Bound-variable hypothesis builder for class substitution. (Contributed by NM, 7-Sep-2014.) (Revised by Mario Carneiro, 12-Oct-2016.) |
Ref | Expression |
---|---|
nfsbc.1 | |
nfsbc.2 |
Ref | Expression |
---|---|
nfsbc |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nftru 1395 | . . 3 | |
2 | nfsbc.1 | . . . 4 | |
3 | 2 | a1i 9 | . . 3 |
4 | nfsbc.2 | . . . 4 | |
5 | 4 | a1i 9 | . . 3 |
6 | 1, 3, 5 | nfsbcd 2834 | . 2 |
7 | 6 | trud 1293 | 1 |
Colors of variables: wff set class |
Syntax hints: wtru 1285 wnf 1389 wnfc 2206 wsbc 2815 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-sbc 2816 |
This theorem is referenced by: cbvralcsf 2964 cbvrexcsf 2965 opelopabf 4029 ralrnmpt 5330 rexrnmpt 5331 dfopab2 5835 dfoprab3s 5836 mpt2xopoveq 5878 |
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