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| Mirrors > Home > MPE Home > Th. List > nffun | Structured version Visualization version GIF version | ||
| Description: Bound-variable hypothesis builder for a function. (Contributed by NM, 30-Jan-2004.) |
| Ref | Expression |
|---|---|
| nffun.1 | ⊢ Ⅎ𝑥𝐹 |
| Ref | Expression |
|---|---|
| nffun | ⊢ Ⅎ𝑥Fun 𝐹 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-fun 6502 | . 2 ⊢ (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹 ∘ ◡𝐹) ⊆ I )) | |
| 2 | nffun.1 | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
| 3 | 2 | nfrel 5737 | . . 3 ⊢ Ⅎ𝑥Rel 𝐹 |
| 4 | 2 | nfcnv 5835 | . . . . 5 ⊢ Ⅎ𝑥◡𝐹 |
| 5 | 2, 4 | nfco 5822 | . . . 4 ⊢ Ⅎ𝑥(𝐹 ∘ ◡𝐹) |
| 6 | nfcv 2899 | . . . 4 ⊢ Ⅎ𝑥 I | |
| 7 | 5, 6 | nfss 3928 | . . 3 ⊢ Ⅎ𝑥(𝐹 ∘ ◡𝐹) ⊆ I |
| 8 | 3, 7 | nfan 1901 | . 2 ⊢ Ⅎ𝑥(Rel 𝐹 ∧ (𝐹 ∘ ◡𝐹) ⊆ I ) |
| 9 | 1, 8 | nfxfr 1855 | 1 ⊢ Ⅎ𝑥Fun 𝐹 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 Ⅎwnf 1785 Ⅎwnfc 2884 ⊆ wss 3903 I cid 5526 ◡ccnv 5631 ∘ ccom 5636 Rel wrel 5637 Fun wfun 6494 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ral 3053 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-rel 5639 df-cnv 5640 df-co 5641 df-fun 6502 |
| This theorem is referenced by: nffn 6599 nff1 6736 fliftfun 7268 funimass4f 32726 nfdfat 47481 |
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