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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 6542 | . 2 ⊢ (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹 ∘ ◡𝐹) ⊆ I )) | |
| 2 | nffun.1 | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
| 3 | 2 | nfrel 5768 | . . 3 ⊢ Ⅎ𝑥Rel 𝐹 |
| 4 | 2 | nfcnv 5866 | . . . . 5 ⊢ Ⅎ𝑥◡𝐹 |
| 5 | 2, 4 | nfco 5853 | . . . 4 ⊢ Ⅎ𝑥(𝐹 ∘ ◡𝐹) |
| 6 | nfcv 2927 | . . . 4 ⊢ Ⅎ𝑥 I | |
| 7 | 5, 6 | nfss 3931 | . . 3 ⊢ Ⅎ𝑥(𝐹 ∘ ◡𝐹) ⊆ I |
| 8 | 3, 7 | nfan 1932 | . 2 ⊢ Ⅎ𝑥(Rel 𝐹 ∧ (𝐹 ∘ ◡𝐹) ⊆ I ) |
| 9 | 1, 8 | nfxfr 1886 | 1 ⊢ Ⅎ𝑥Fun 𝐹 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 Ⅎwnf 1816 Ⅎwnfc 2912 ⊆ wss 3906 I cid 5557 ◡ccnv 5662 ∘ ccom 5667 Rel wrel 5668 Fun wfun 6534 |
| 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-fun 6542 |
| This theorem is used by: nffn 6638 nff1 6776 fliftfun 7316 funimass4f 33029 nfdfat 47897 |
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