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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 6545 | . 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 6705 | . . 3 ⊢ Ⅎ𝑥 𝐹:𝐴⟶𝐵 |
| 6 | 2 | nfcnv 5866 | . . . 4 ⊢ Ⅎ𝑥◡𝐹 |
| 7 | 6 | nffun 6563 | . . 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 2912 ◡ccnv 5662 Fun wfun 6534 ⟶wf 6536 –1-1→wf1 6537 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 |
| 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 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ral 3082 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-br 5112 df-opab 5176 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 |
| This theorem is used by: nff1o 6822 iundom2g 10541 |
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