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Theorem ssdifd 3079
 Description: If is contained in , then is contained in . Deduction form of ssdif 3078. (Contributed by David Moews, 1-May-2017.)
Hypothesis
Ref Expression
ssdifd.1
Assertion
Ref Expression
ssdifd

Proof of Theorem ssdifd
StepHypRef Expression
1 ssdifd.1 . 2
2 ssdif 3078 . 2
31, 2syl 14 1
 Colors of variables: wff set class Syntax hints:   wi 4   cdif 2914   wss 2917 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in1 544  ax-in2 545  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022 This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559  df-dif 2920  df-in 2924  df-ss 2931 This theorem is referenced by:  ssdif2d  3082  phplem4dom  6324
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