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Theorem difexg 4141
Description: Existence of a difference. (Contributed by NM, 26-May-1998.)
Assertion
Ref Expression
difexg (𝐴𝑉 → (𝐴𝐵) ∈ V)

Proof of Theorem difexg
StepHypRef Expression
1 difss 3261 . 2 (𝐴𝐵) ⊆ 𝐴
2 ssexg 4139 . 2 (((𝐴𝐵) ⊆ 𝐴𝐴𝑉) → (𝐴𝐵) ∈ V)
31, 2mpan 424 1 (𝐴𝑉 → (𝐴𝐵) ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2148  Vcvv 2737  cdif 3126  wss 3129
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-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159  ax-sep 4118
This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-v 2739  df-dif 3131  df-in 3135  df-ss 3142
This theorem is referenced by:  frirrg  4346  2oconcl  6433  phplem4dom  6855  fidifsnen  6863  findcard  6881  findcard2  6882  findcard2s  6883  fisseneq  6924  difinfsn  7092  ismkvnex  7146  exmidfodomrlemim  7193
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