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| Mirrors > Home > MPE Home > Th. List > nffn | Structured version Visualization version GIF version | ||
| Description: Bound-variable hypothesis builder for a function with domain. (Contributed by NM, 30-Jan-2004.) |
| Ref | Expression |
|---|---|
| nffn.1 | ⊢ Ⅎ𝑥𝐹 |
| nffn.2 | ⊢ Ⅎ𝑥𝐴 |
| Ref | Expression |
|---|---|
| nffn | ⊢ Ⅎ𝑥 𝐹 Fn 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-fn 6546 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ (Fun 𝐹 ∧ dom 𝐹 = 𝐴)) | |
| 2 | nffn.1 | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
| 3 | 2 | nffun 6567 | . . 3 ⊢ Ⅎ𝑥Fun 𝐹 |
| 4 | 2 | nfdm 5934 | . . . 4 ⊢ Ⅎ𝑥dom 𝐹 |
| 5 | nffn.2 | . . . 4 ⊢ Ⅎ𝑥𝐴 | |
| 6 | 4, 5 | nfeq 2935 | . . 3 ⊢ Ⅎ𝑥dom 𝐹 = 𝐴 |
| 7 | 3, 6 | nfan 1931 | . 2 ⊢ Ⅎ𝑥(Fun 𝐹 ∧ dom 𝐹 = 𝐴) |
| 8 | 1, 7 | nfxfr 1885 | 1 ⊢ Ⅎ𝑥 𝐹 Fn 𝐴 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1569 Ⅎwnf 1815 Ⅎwnfc 2907 dom cdm 5651 Fun wfun 6537 Fn wfn 6538 |
| 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 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-fun 6545 df-fn 6546 |
| This theorem is used by: nff 6710 nffo 6800 feqmptdf 6960 nfixpw 8952 nfixp 8953 nfixp1 8954 bnj1463 35735 choicefi 46350 stoweidlem31 47177 stoweidlem35 47181 stoweidlem59 47205 |
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