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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 5203 | . 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 5344 | . . 3 ⊢ Ⅎ𝑥 𝐹:𝐴⟶𝐵 |
6 | 2 | nfcnv 4790 | . . . 4 ⊢ Ⅎ𝑥◡𝐹 |
7 | 6 | nffun 5221 | . . 3 ⊢ Ⅎ𝑥Fun ◡𝐹 |
8 | 5, 7 | nfan 1558 | . 2 ⊢ Ⅎ𝑥(𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹) |
9 | 1, 8 | nfxfr 1467 | 1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵 |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 Ⅎwnf 1453 Ⅎwnfc 2299 ◡ccnv 4610 Fun wfun 5192 ⟶wf 5194 –1-1→wf1 5195 |
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 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-ext 2152 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ral 2453 df-v 2732 df-un 3125 df-in 3127 df-ss 3134 df-sn 3589 df-pr 3590 df-op 3592 df-br 3990 df-opab 4051 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 |
This theorem is referenced by: nff1o 5440 |
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