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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 24845 | . . 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 7609 | . 2 ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ∈ 𝒫 ℂ) |
| 3 | 2 | elpwid 4550 | 1 ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ⊆ ℂ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 ∀wral 3051 ∃wrex 3061 {crab 3389 ⊆ wss 3889 𝒫 cpw 4541 class class class wbr 5085 ‘cfv 6498 (class class class)co 7367 ↑m cmap 8773 ℂcc 11036 < clt 11179 − cmin 11377 ℝ+crp 12942 abscabs 15196 –cn→ccncf 24843 |
| 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 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| 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-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-xp 5637 df-dm 5641 df-iota 6454 df-fv 6506 df-ov 7370 df-oprab 7371 df-mpo 7372 df-cncf 24845 |
| This theorem is referenced by: cncff 24860 cncfi 24861 rescncf 24864 cncfcdm 24865 cncfco 24874 cncfcompt2 24875 cncfmpt2f 24882 cncfcnvcn 24892 mulcncf 25413 cncombf 25625 cnlimci 25856 ulmcn 26364 efmul2picn 34740 mulcncff 46298 subcncff 46308 negcncfg 46309 addcncff 46312 ioccncflimc 46313 icocncflimc 46317 divcncff 46319 |
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