Theorem eqimss2 3297

Description: Equality implies the subclass relation. (Contributed by NM, 23-Nov-2003.)

Assertion

Ref	Expression
eqimss2	|- ( B = A -> A C_ B )

Proof of Theorem eqimss2

Step	Hyp	Ref	Expression
1		eqimss 3296	. 2 |- ( A = B -> A C_ B )
2	1	eqcoms 2237	1 |- ( B = A -> A C_ B )

Syntax hints:   -> wi 4   = wceq 1398   C_ wss 3214

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 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-11 1555  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216

This theorem depends on definitions:  df-bi 117  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-in 3220  df-ss 3227

This theorem is referenced by:  ifpprsnssdc  3804  disjeq2  4094  disjeq1  4097  poeq2  4426  seeq1  4465  seeq2  4466  dmcoeq  5035  xp11m  5206  funeq  5377  fconst3m  5908  tposeq  6491  undifdcss  7196  nninfctlemfo  12761  ennnfonelemk  13235  ennnfonelemss  13245  qnnen  13266  imasaddfnlemg  13578  topgele  15020  topontopn  15028  txdis  15268  edgstruct  16185