ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  difeq2d GIF version

Theorem difeq2d 3133
Description: Deduction adding difference to the left in a class equality. (Contributed by NM, 15-Nov-2002.)
Hypothesis
Ref Expression
difeq1d.1 (𝜑𝐴 = 𝐵)
Assertion
Ref Expression
difeq2d (𝜑 → (𝐶𝐴) = (𝐶𝐵))

Proof of Theorem difeq2d
StepHypRef Expression
1 difeq1d.1 . 2 (𝜑𝐴 = 𝐵)
2 difeq2 3127 . 2 (𝐴 = 𝐵 → (𝐶𝐴) = (𝐶𝐵))
31, 2syl 14 1 (𝜑 → (𝐶𝐴) = (𝐶𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1296  cdif 3010
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 582  ax-in2 583  ax-5 1388  ax-7 1389  ax-gen 1390  ax-ie1 1434  ax-ie2 1435  ax-8 1447  ax-11 1449  ax-4 1452  ax-17 1471  ax-i9 1475  ax-ial 1479  ax-i5r 1480  ax-ext 2077
This theorem depends on definitions:  df-bi 116  df-tru 1299  df-nf 1402  df-sb 1700  df-clab 2082  df-cleq 2088  df-clel 2091  df-ral 2375  df-rab 2379  df-dif 3015
This theorem is referenced by:  difeq12d  3134  phplem3  6650  phplem4  6651  phplem3g  6652  phplem4dom  6658  phplem4on  6663  fidifsnen  6666  xpfi  6720  sbthlem2  6747  sbthlemi3  6748  isbth  6756  setsvalg  11689  setsvala  11690
  Copyright terms: Public domain W3C validator