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Theorem ssv 3270
Description: Any class is a subclass of the universal class. Dual of 0ss 3561. (Contributed by NM, 31-Oct-1995.)
Assertion
Ref Expression
ssv  |-  A  C_  _V

Proof of Theorem ssv
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 elex 2833 . 2  |-  ( x  e.  A  ->  x  e.  _V )
21ssriv 3252 1  |-  A  C_  _V
Colors of variables:    wff set class
This proof depends on syntax axioms:   _Vcvv 2821    C_ wss 3220
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-11 1559  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-v 2823  df-in 3226  df-ss 3233
This theorem is used by:  ddifss  3469  inv1  3559  unv  3560  vss  3568  disj2  3580  pwv  3934  trv  4243  xpss  4885  djussxp  4927  dmv  4999  dmresi  5121  resid  5123  ssrnres  5233  rescnvcnv  5253  cocnvcnv1  5301  relrelss  5317  dffn2  5538  oprabss  6177  ofmres  6373  f1stres  6397  f2ndres  6398  fiintim  7242  residfi  7258  djuf1olemr  7400  endjusym  7442  dju1p1e2  7555  suplocexprlemell  8086  seq3val  10918  seqvalcd  10919  seq3-1  10920  seqf  10922  seq3p1  10923  seqf2  10926  seq1cd  10927  seqp1cd  10928  seqclg  10930  seqfeq4g  10989  wrdv  11342  setscom  13450  gzsumwsubmcl  13860  gzsumcl  13863  gsum2dfilem2  14272  prdsinvlem  14303  rngmgpf  14343  mgpf  14422  crngridl  14976  upxp  15498  uptx  15500  cnmptid  15507  cnmpt1st  15514  cnmpt2nd  15515
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