MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  cncfrss Structured version   Visualization version   GIF version

Theorem cncfrss 25192
Description: Reverse closure of the continuous function predicate. (Contributed by Mario Carneiro, 25-Aug-2014.)
Assertion
Ref Expression
cncfrss (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ⊆ ℂ)

Proof of Theorem cncfrss
Dummy variables 𝑎 𝑏 𝑓 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-cncf 25179 . . 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)})
21elmpocl1 7655 . 2 (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ∈ 𝒫 ℂ)
32elpwid 4566 1 (𝐹 ∈ (𝐴–cn→𝐵) → 𝐴 ⊆ ℂ)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2145  ∀wral 3077  ∃wrex 3087  {crab 3413   ⊆ wss 3899  𝒫 cpw 4557   class class class wbr 5103  ‘cfv 6531  (class class class)co 7412   ↑m cmap 8831  ℂcc 11179   < clt 11324   − cmin 11522  ℝ+crp 13101  abscabs 15381  –cn→ccncf 25177
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 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-sep 5249  ax-nul 5260  ax-pr 5391
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-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-opab 5168  df-xp 5657  df-dm 5661  df-iota 6487  df-fv 6539  df-ov 7415  df-oprab 7416  df-mpo 7417  df-cncf 25179
This theorem is used by:  cncff  25194  cncfi  25195  rescncf  25198  cncfcdm  25199  cncfco  25208  cncfcompt2  25209  cncfmpt2f  25216  cncfcnvcn  25226  mulcncf  25747  cncombf  25959  cnlimci  26189  ulmcn  26708  efmul2picn  35208  mulcncff  46824  subcncff  46834  negcncfg  46835  addcncff  46838  ioccncflimc  46839  icocncflimc  46843  divcncff  46845
  Copyright terms: Public domain W3C validator