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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 6511 | . 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 6672 | . . 3 ⊢ Ⅎ𝑥 𝐹:𝐴⟶𝐵 |
| 6 | 2 | nfcnv 5839 | . . . 4 ⊢ Ⅎ𝑥◡𝐹 |
| 7 | 6 | nffun 6529 | . . 3 ⊢ Ⅎ𝑥Fun ◡𝐹 |
| 8 | 5, 7 | nfan 1909 | . 2 ⊢ Ⅎ𝑥(𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹) |
| 9 | 1, 8 | nfxfr 1863 | 1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 398 Ⅎwnf 1793 Ⅎwnfc 2899 ◡ccnv 5635 Fun wfun 6500 ⟶wf 6502 –1-1→wf1 6503 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-10 2165 ax-11 2181 ax-12 2202 ax-ext 2724 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-nf 1794 df-sb 2081 df-clab 2731 df-cleq 2744 df-clel 2827 df-nfc 2901 df-ral 3067 df-rab 3405 df-v 3446 df-dif 3898 df-un 3900 df-ss 3912 df-nul 4277 df-if 4471 df-sn 4573 df-pr 4575 df-op 4579 df-br 5091 df-opab 5153 df-rel 5643 df-cnv 5644 df-co 5645 df-dm 5646 df-rn 5647 df-fun 6508 df-fn 6509 df-f 6510 df-f1 6511 |
| This theorem is referenced by: nff1o 6789 iundom2g 10483 |
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