| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 24920 | . . 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 7634 | . 2 ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ∈ 𝒫 ℂ) |
| 3 | 2 | elpwid 4563 | 1 ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ⊆ ℂ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2141 ∀wral 3075 ∃wrex 3085 {crab 3413 ⊆ wss 3904 𝒫 cpw 4554 class class class wbr 5099 ‘cfv 6517 (class class class)co 7392 ↑m cmap 8803 ℂcc 11068 < clt 11213 − cmin 11411 ℝ+crp 12990 abscabs 15244 –cn→ccncf 24918 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-nul 5255 ax-pr 5389 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-xp 5651 df-dm 5655 df-iota 6473 df-fv 6525 df-ov 7395 df-oprab 7396 df-mpo 7397 df-cncf 24920 |
| This theorem is referenced by: cncff 24935 cncfi 24936 rescncf 24939 cncfcdm 24940 cncfco 24949 cncfcompt2 24950 cncfmpt2f 24957 cncfcnvcn 24967 mulcncf 25488 cncombf 25700 cnlimci 25931 ulmcn 26439 efmul2picn 34854 mulcncff 46408 subcncff 46418 negcncfg 46419 addcncff 46422 ioccncflimc 46423 icocncflimc 46427 divcncff 46429 |
| Copyright terms: Public domain | W3C validator |