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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 6543 | . 2 ⊢ (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹 ∘ ◡𝐹) ⊆ I )) | |
| 2 | nffun.1 | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
| 3 | 2 | nfrel 5756 | . . 3 ⊢ Ⅎ𝑥Rel 𝐹 |
| 4 | 2 | nfcnv 5856 | . . . . 5 ⊢ Ⅎ𝑥◡𝐹 |
| 5 | 2, 4 | nfco 5843 | . . . 4 ⊢ Ⅎ𝑥(𝐹 ∘ ◡𝐹) |
| 6 | nfcv 2922 | . . . 4 ⊢ Ⅎ𝑥 I | |
| 7 | 5, 6 | nfss 3902 | . . 3 ⊢ Ⅎ𝑥(𝐹 ∘ ◡𝐹) ⊆ I |
| 8 | 3, 7 | nfan 1931 | . 2 ⊢ Ⅎ𝑥(Rel 𝐹 ∧ (𝐹 ∘ ◡𝐹) ⊆ I ) |
| 9 | 1, 8 | nfxfr 1885 | 1 ⊢ Ⅎ𝑥Fun 𝐹 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 Ⅎwnf 1815 Ⅎwnfc 2907 ⊆ wss 3896 I cid 5544 ◡ccnv 5649 ∘ ccom 5654 Rel wrel 5655 Fun wfun 6535 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-rel 5657 df-cnv 5658 df-co 5659 df-fun 6543 |
| This theorem is used by: nffn 6641 nff1 6779 fliftfun 7322 funimass4f 33280 srepdflem1 36006 nfdfat 48304 |
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