MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  cusgrexilem1 Structured version   Visualization version   GIF version

Theorem cusgrexilem1 29525
Description: Lemma 1 for cusgrexi 29529. (Contributed by Alexander van der Vekens, 12-Jan-2018.)
Hypothesis
Ref Expression
usgrexi.p 𝑃 = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2}
Assertion
Ref Expression
cusgrexilem1 (𝑉𝑊 → ( I ↾ 𝑃) ∈ V)
Distinct variable group:   𝑥,𝑉
Allowed substitution hints:   𝑃(𝑥)   𝑊(𝑥)

Proof of Theorem cusgrexilem1
StepHypRef Expression
1 usgrexi.p . . 3 𝑃 = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2}
2 pwexg 5316 . . 3 (𝑉𝑊 → 𝒫 𝑉 ∈ V)
31, 2rabexd 5278 . 2 (𝑉𝑊𝑃 ∈ V)
4 resiexg 7857 . 2 (𝑃 ∈ V → ( I ↾ 𝑃) ∈ V)
53, 4syl 17 1 (𝑉𝑊 → ( I ↾ 𝑃) ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1542  wcel 2114  {crab 3390  Vcvv 3430  𝒫 cpw 4542   I cid 5519  cres 5627  cfv 6493  2c2 12230  chash 14286
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-ext 2709  ax-sep 5232  ax-pow 5303  ax-pr 5371  ax-un 7683
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-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3063  df-rab 3391  df-v 3432  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-br 5087  df-opab 5149  df-id 5520  df-xp 5631  df-rel 5632  df-res 5637
This theorem is referenced by:  usgrexi  29527  cusgrexi  29529  cusgrexg  29530  structtousgr  29531  structtocusgr  29532
  Copyright terms: Public domain W3C validator