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Theorem eqimss 3281
Description: Equality implies the subclass relation. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Andrew Salmon, 21-Jun-2011.)
Assertion
Ref Expression
eqimss (𝐴 = 𝐵𝐴𝐵)

Proof of Theorem eqimss
StepHypRef Expression
1 eqss 3242 . 2 (𝐴 = 𝐵 ↔ (𝐴𝐵𝐵𝐴))
21simplbi 274 1 (𝐴 = 𝐵𝐴𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1397  wss 3200
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 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-11 1554  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-in 3206  df-ss 3213
This theorem is referenced by:  eqimss2  3282  uneqin  3458  ssprsseq  3835  sssnr  3836  sssnm  3837  ssprr  3839  sstpr  3840  snsspw  3847  pwpwssunieq  4059  elpwuni  4060  disjeq2  4068  disjeq1  4071  pwne  4250  pwssunim  4381  poeq2  4397  seeq1  4436  seeq2  4437  trsucss  4520  onsucelsucr  4606  xp11m  5175  funeq  5346  fnresdm  5441  fssxp  5502  ffdm  5505  fcoi1  5517  fof  5559  dff1o2  5588  fvmptss2  5721  fvmptssdm  5731  fprg  5837  dff1o6  5917  tposeq  6413  el2oss1o  6611  nntri1  6664  nntri2or2  6666  nnsseleq  6669  infnninf  7323  infnninfOLD  7324  nninfwlpoimlemg  7374  exmidontri2or  7461  frec2uzf1od  10669  hashinfuni  11040  setsresg  13125  setsslid  13138  strle1g  13194  cncnpi  14958  hmeores  15045  limcimolemlt  15394  recnprss  15417  plycoeid3  15487  0nninf  16632  nninfall  16637
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