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Theorem inss2 3425
Description: The intersection of two classes is a subset of one of them. Part of Exercise 12 of [TakeutiZaring] p. 18. (Contributed by NM, 27-Apr-1994.)
Assertion
Ref Expression
inss2  |-  ( A  i^i  B )  C_  B

Proof of Theorem inss2
StepHypRef Expression
1 incom 3396 . 2  |-  ( B  i^i  A )  =  ( A  i^i  B
)
2 inss1 3424 . 2  |-  ( B  i^i  A )  C_  B
31, 2eqsstrri 3257 1  |-  ( A  i^i  B )  C_  B
Colors of variables: wff set class
Syntax hints:    i^i cin 3196    C_ 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-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  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-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2801  df-in 3203  df-ss 3210
This theorem is referenced by:  difin0  3565  bnd2  4257  ordin  4476  relin2  4838  relres  5033  ssrnres  5171  cnvcnv  5181  funinsn  5370  funimaexg  5405  fnresin2  5439  ssimaex  5697  ffvresb  5800  fnfvimad  5879  ofrfval  6233  ofvalg  6234  ofrval  6235  off  6237  ofres  6239  ofco  6243  offres  6286  tpostpos  6416  smores3  6445  tfrlem5  6466  tfrexlem  6486  erinxp  6764  pmresg  6831  unfiin  7099  ltrelpi  7522  peano5nnnn  8090  peano5nni  9124  rexanuz  11515  bitsinv1  12489  structcnvcnv  13064  ressbasssd  13118  restsspw  13298  eltg4i  14745  ntrss2  14811  ntrin  14814  isopn3  14815  resttopon  14861  restuni2  14867  cnrest2r  14927  cnptopresti  14928  cnptoprest  14929  lmss  14936  metrest  15196  tgioo  15244  2sqlem8  15818  2sqlem9  15819  peano5set  16386
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