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| Mirrors > Home > MPE Home > Th. List > cncfrss | Structured version Visualization version GIF version | ||
| Description: Reverse closure of the continuous function predicate. (Contributed by Mario Carneiro, 25-Aug-2014.) |
| Ref | Expression |
|---|---|
| cncfrss | ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ⊆ ℂ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-cncf 24787 | . . 3 ⊢ –cn→ = (𝑎 ∈ 𝒫 ℂ, 𝑏 ∈ 𝒫 ℂ ↦ {𝑓 ∈ (𝑏 ↑m 𝑎) ∣ ∀𝑥 ∈ 𝑎 ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ 𝑎 ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦)}) | |
| 2 | 1 | elmpocl1 7595 | . 2 ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ∈ 𝒫 ℂ) |
| 3 | 2 | elpwid 4562 | 1 ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ⊆ ℂ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2109 ∀wral 3044 ∃wrex 3053 {crab 3396 ⊆ wss 3905 𝒫 cpw 4553 class class class wbr 5095 ‘cfv 6486 (class class class)co 7353 ↑m cmap 8760 ℂcc 11026 < clt 11168 − cmin 11365 ℝ+crp 12911 abscabs 15159 –cn→ccncf 24785 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5238 ax-nul 5248 ax-pr 5374 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ral 3045 df-rex 3054 df-rab 3397 df-v 3440 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-br 5096 df-opab 5158 df-xp 5629 df-dm 5633 df-iota 6442 df-fv 6494 df-ov 7356 df-oprab 7357 df-mpo 7358 df-cncf 24787 |
| This theorem is referenced by: cncff 24802 cncfi 24803 rescncf 24806 cncfcdm 24807 cncfco 24816 cncfcompt2 24817 cncfmpt2f 24824 cncfcnvcn 24835 mulcncf 25362 cncombf 25575 cnlimci 25806 ulmcn 26324 efmul2picn 34563 mulcncff 45852 subcncff 45862 negcncfg 45863 addcncff 45866 ioccncflimc 45867 icocncflimc 45871 divcncff 45873 |
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