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Mirrors > Home > ILE Home > Th. List > nfuni | Unicode version |
Description: Bound-variable hypothesis builder for union. (Contributed by NM, 30-Dec-1996.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
Ref | Expression |
---|---|
nfuni.1 |
Ref | Expression |
---|---|
nfuni |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfuni2 3733 | . 2 | |
2 | nfuni.1 | . . . 4 | |
3 | nfv 1508 | . . . 4 | |
4 | 2, 3 | nfrexxy 2470 | . . 3 |
5 | 4 | nfab 2284 | . 2 |
6 | 1, 5 | nfcxfr 2276 | 1 |
Colors of variables: wff set class |
Syntax hints: cab 2123 wnfc 2266 wrex 2415 cuni 3731 |
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 2119 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-rex 2420 df-uni 3732 |
This theorem is referenced by: nfiota1 5085 nfrecs 6197 nfsup 6872 |
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