ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  ralcom GIF version

Theorem ralcom 2714
Description: Commutation of restricted quantifiers. (Contributed by NM, 13-Oct-1999.) (Revised by Mario Carneiro, 14-Oct-2016.)
Assertion
Ref Expression
ralcom (∀𝑥𝐴𝑦𝐵 𝜑 ↔ ∀𝑦𝐵𝑥𝐴 𝜑)
Distinct variable groups:   𝑥,𝑦   𝑥,𝐵   𝑦,𝐴
Allowed substitution hints:   𝜑(𝑥, 𝑦)   𝐴(𝑥)   𝐵(𝑦)

Proof of Theorem ralcom
StepHypRef Expression
1 nfcv 2392 . 2 𝑦𝐴
2 nfcv 2392 . 2 𝑥𝐵
31, 2ralcomf 2712 1 (∀𝑥𝐴𝑦𝐵 𝜑 ↔ ∀𝑦𝐵𝑥𝐴 𝜑)
Colors of variables:    wff set class
This proof depends on syntax axioms:  wb 105  wral 2528
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-nf 1514  df-sb 1816  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533
This theorem is used by:  ralrot3  2716  ralcom4  2844  ssint  3986  issod  4464  reusv3  4606  cnvpom  5330  cnvsom  5331  fununi  5449  isocnv2  6018  dfsmo2  6558  ixpiinm  7006  rexfiuz  11755  isnsg2  14006  opprsubrngg  14519  opprdomnbg  14583  rmodislmodlem  14687  rmodislmod  14688  tgss2  15180  cnmptcom  15399
  Copyright terms: Public domain W3C validator