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| Mirrors > Home > MPE Home > Th. List > nff1 | Structured version Visualization version 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 6538 | . 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 6699 | . . 3 ⊢ Ⅎ𝑥 𝐹:𝐴⟶𝐵 |
| 6 | 2 | nfcnv 5858 | . . . 4 ⊢ Ⅎ𝑥◡𝐹 |
| 7 | 6 | nffun 6556 | . . 3 ⊢ Ⅎ𝑥Fun ◡𝐹 |
| 8 | 5, 7 | nfan 1932 | . 2 ⊢ Ⅎ𝑥(𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹) |
| 9 | 1, 8 | nfxfr 1886 | 1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 Ⅎwnf 1816 Ⅎwnfc 2907 ◡ccnv 5654 Fun wfun 6527 ⟶wf 6529 –1-1→wf1 6530 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 |
| This theorem is used by: nff1o 6816 iundom2g 10549 |
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