Users' Mathboxes Mathbox for Richard Penner < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  clsneibex Structured version   Visualization version   GIF version

Theorem clsneibex 45195
Description: If (pseudo-)closure and (pseudo-)neighborhood functions are related by the composite operator, 𝐻, then the base set exists. (Contributed by RP, 4-Jun-2021.)
Hypotheses
Ref Expression
clsneibex.d 𝐷 = (𝑃‘𝐵)
clsneibex.h 𝐻 = (𝐹 ∘ 𝐷)
clsneibex.r (𝜑 → 𝐾𝐻𝑁)
Assertion
Ref Expression
clsneibex (𝜑 → 𝐵 ∈ V)

Proof of Theorem clsneibex
StepHypRef Expression
1 clsneibex.h . . . . 5 𝐻 = (𝐹 ∘ 𝐷)
2 clsneibex.d . . . . . 6 𝐷 = (𝑃‘𝐵)
32coeq2i 5837 . . . . 5 (𝐹 ∘ 𝐷) = (𝐹 ∘ (𝑃‘𝐵))
41, 3eqtri 2783 . . . 4 𝐻 = (𝐹 ∘ (𝑃‘𝐵))
54a1i 11 . . 3 (𝜑 → 𝐻 = (𝐹 ∘ (𝑃‘𝐵)))
6 clsneibex.r . . 3 (𝜑 → 𝐾𝐻𝑁)
75, 6breqdi 5117 . 2 (𝜑 → 𝐾(𝐹 ∘ (𝑃‘𝐵))𝑁)
8 brne0 5154 . 2 (𝐾(𝐹 ∘ (𝑃‘𝐵))𝑁 → (𝐹 ∘ (𝑃‘𝐵)) ≠ ∅)
9 fvprc 6877 . . . . . . . 8 (¬ 𝐵 ∈ V → (𝑃‘𝐵) = ∅)
109rneqd 5919 . . . . . . 7 (¬ 𝐵 ∈ V → ran (𝑃‘𝐵) = ran ∅)
11 rn0 5907 . . . . . . 7 ran ∅ = ∅
1210, 11eqtrdi 2811 . . . . . 6 (¬ 𝐵 ∈ V → ran (𝑃‘𝐵) = ∅)
1312ineq2d 4117 . . . . 5 (¬ 𝐵 ∈ V → (dom 𝐹 ∩ ran (𝑃‘𝐵)) = (dom 𝐹 ∩ ∅))
14 in0 4344 . . . . 5 (dom 𝐹 ∩ ∅) = ∅
1513, 14eqtrdi 2811 . . . 4 (¬ 𝐵 ∈ V → (dom 𝐹 ∩ ran (𝑃‘𝐵)) = ∅)
1615coemptyd 15137 . . 3 (¬ 𝐵 ∈ V → (𝐹 ∘ (𝑃‘𝐵)) = ∅)
1716necon1ai 2982 . 2 ((𝐹 ∘ (𝑃‘𝐵)) ≠ ∅ → 𝐵 ∈ V)
187, 8, 173syl 19 1 (𝜑 → 𝐵 ∈ V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   → wi 4   = wceq 1569   ∈ wcel 2144   ≠ wne 2955  Vcvv 3450   ∩ cin 4089  ∅c0 4278   class class class wbr 5102  dom cdm 5650  ran crn 5651   ∘ ccom 5654  ‘cfv 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-ext 2732  ax-sep 5248  ax-nul 5259  ax-pr 5390
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-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-res 5662  df-iota 6494  df-fv 6546
This theorem is used by:  clsneircomplex  45196  clsneif1o  45197  clsneicnv  45198  clsneikex  45199  clsneinex  45200  clsneiel1  45201
  Copyright terms: Public domain W3C validator