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Mirrors > Home > ILE Home > Th. List > nff1 | GIF version |
Description: Bound-variable hypothesis builder for a one-to-one function. (Contributed by NM, 16-May-2004.) |
Ref | Expression |
---|---|
nff1.1 | ⊢ Ⅎ𝑥𝐹 |
nff1.2 | ⊢ Ⅎ𝑥𝐴 |
nff1.3 | ⊢ Ⅎ𝑥𝐵 |
Ref | Expression |
---|---|
nff1 | ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-f1 5193 | . 2 ⊢ (𝐹:𝐴–1-1→𝐵 ↔ (𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹)) | |
2 | nff1.1 | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
3 | nff1.2 | . . . 4 ⊢ Ⅎ𝑥𝐴 | |
4 | nff1.3 | . . . 4 ⊢ Ⅎ𝑥𝐵 | |
5 | 2, 3, 4 | nff 5334 | . . 3 ⊢ Ⅎ𝑥 𝐹:𝐴⟶𝐵 |
6 | 2 | nfcnv 4783 | . . . 4 ⊢ Ⅎ𝑥◡𝐹 |
7 | 6 | nffun 5211 | . . 3 ⊢ Ⅎ𝑥Fun ◡𝐹 |
8 | 5, 7 | nfan 1553 | . 2 ⊢ Ⅎ𝑥(𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹) |
9 | 1, 8 | nfxfr 1462 | 1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵 |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 Ⅎwnf 1448 Ⅎwnfc 2295 ◡ccnv 4603 Fun wfun 5182 ⟶wf 5184 –1-1→wf1 5185 |
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 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-ext 2147 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-v 2728 df-un 3120 df-in 3122 df-ss 3129 df-sn 3582 df-pr 3583 df-op 3585 df-br 3983 df-opab 4044 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 |
This theorem is referenced by: nff1o 5430 |
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