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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 6547 | . 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 6713 | . . 3 ⊢ Ⅎ𝑥 𝐹:𝐴⟶𝐵 |
| 6 | 2 | nfcnv 5871 | . . . 4 ⊢ Ⅎ𝑥◡𝐹 |
| 7 | 6 | nffun 6570 | . . 3 ⊢ Ⅎ𝑥Fun ◡𝐹 |
| 8 | 5, 7 | nfan 1898 | . 2 ⊢ Ⅎ𝑥(𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹) |
| 9 | 1, 8 | nfxfr 1852 | 1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 Ⅎwnf 1782 Ⅎwnfc 2882 ◡ccnv 5666 Fun wfun 6536 ⟶wf 6538 –1-1→wf1 6539 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ral 3051 df-rab 3421 df-v 3466 df-dif 3936 df-un 3938 df-ss 3950 df-nul 4316 df-if 4508 df-sn 4609 df-pr 4611 df-op 4615 df-br 5126 df-opab 5188 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 |
| This theorem is referenced by: nff1o 6827 iundom2g 10563 |
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