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

Theorem neeqtrrd 2250
Description: Substitution of equal classes into an inequality. (Contributed by NM, 4-Jul-2012.)
Hypotheses
Ref Expression
neeqtrrd.1 (𝜑𝐴𝐵)
neeqtrrd.2 (𝜑𝐶 = 𝐵)
Assertion
Ref Expression
neeqtrrd (𝜑𝐴𝐶)

Proof of Theorem neeqtrrd
StepHypRef Expression
1 neeqtrrd.1 . 2 (𝜑𝐴𝐵)
2 neeqtrrd.2 . . 3 (𝜑𝐶 = 𝐵)
32eqcomd 2061 . 2 (𝜑𝐵 = 𝐶)
41, 3neeqtrd 2248 1 (𝜑𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1259  wne 2220
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-in1 554  ax-in2 555  ax-5 1352  ax-gen 1354  ax-4 1416  ax-17 1435  ax-ext 2038
This theorem depends on definitions:  df-bi 114  df-cleq 2049  df-ne 2221
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator