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

Theorem eqsstrd 3260
Description: Substitution of equality into a subclass relationship. (Contributed by NM, 25-Apr-2004.)
Hypotheses
Ref Expression
eqsstrd.1 (𝜑𝐴 = 𝐵)
eqsstrd.2 (𝜑𝐵𝐶)
Assertion
Ref Expression
eqsstrd (𝜑𝐴𝐶)

Proof of Theorem eqsstrd
StepHypRef Expression
1 eqsstrd.2 . 2 (𝜑𝐵𝐶)
2 eqsstrd.1 . . 3 (𝜑𝐴 = 𝐵)
32sseq1d 3253 . 2 (𝜑 → (𝐴𝐶𝐵𝐶))
41, 3mpbird 167 1 (𝜑𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1395  wss 3197
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-11 1552  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-in 3203  df-ss 3210
This theorem is referenced by:  eqsstrrd  3261  eqsstrdi  3276  tfisi  4679  funresdfunsnss  5846  suppssof1  6242  pw2f1odclem  7003  phplem4dom  7031  fival  7148  fiuni  7156  cardonle  7370  exmidfodomrlemim  7390  frecuzrdgtclt  10655  4sqlem19  12947  ennnfonelemkh  12998  ennnfonelemf1  13004  strfvssn  13069  setscom  13087  imasaddfnlemg  13362  imasaddflemg  13364  znleval  14632  tgrest  14858  resttopon  14860  rest0  14868  lmtopcnp  14939  metequiv2  15185  xmettx  15199  ellimc3apf  15349  dvfvalap  15370  dvcjbr  15397  dvcj  15398  dvfre  15399  uhgredgm  15949  upgredgssen  15952  umgredgssen  15953  edgumgren  15955  usgredgssen  15975  nnsf  16431
  Copyright terms: Public domain W3C validator