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Theorem inss2 3297
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 3268 . 2  |-  ( B  i^i  A )  =  ( A  i^i  B
)
2 inss1 3296 . 2  |-  ( B  i^i  A )  C_  B
31, 2eqsstrri 3130 1  |-  ( A  i^i  B )  C_  B
Colors of variables: wff set class
Syntax hints:    i^i cin 3070    C_ wss 3071
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121
This theorem depends on definitions:  df-bi 116  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-v 2688  df-in 3077  df-ss 3084
This theorem is referenced by:  difin0  3436  bnd2  4097  ordin  4307  relin2  4658  relres  4847  ssrnres  4981  cnvcnv  4991  funinsn  5172  funimaexg  5207  fnresin2  5238  ssimaex  5482  ffvresb  5583  ofrfval  5990  ofvalg  5991  ofrval  5992  off  5994  ofres  5996  ofco  6000  offres  6033  tpostpos  6161  smores3  6190  tfrlem5  6211  tfrexlem  6231  erinxp  6503  pmresg  6570  unfiin  6814  ltrelpi  7132  peano5nnnn  7700  peano5nni  8723  rexanuz  10760  structcnvcnv  11975  restsspw  12130  eltg4i  12224  ntrss2  12290  ntrin  12293  isopn3  12294  resttopon  12340  restuni2  12346  cnrest2r  12406  cnptopresti  12407  cnptoprest  12408  lmss  12415  metrest  12675  tgioo  12715  peano5set  13138
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