Theorem difexg 4229

Description: Existence of a difference. (Contributed by NM, 26-May-1998.)

Assertion

Ref	Expression
difexg	|- ( A e. V -> ( A \ B ) e. _V )

Proof of Theorem difexg

Step	Hyp	Ref	Expression
1		difss 3331	. 2 |- ( A \ B ) C_ A
2		ssexg 4226	. 2 |- ( ( ( A \ B ) C_ A /\ A e. V ) -> ( A \ B ) e. _V )
3	1, 2	mpan 424	1 |- ( A e. V -> ( A \ B ) e. _V )

Syntax hints:   -> wi 4   e. wcel 2200   _Vcvv 2800   \ cdif 3195   C_ wss 3198

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 617  ax-in2 618  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  ax-sep 4205

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 2802  df-dif 3200  df-in 3204  df-ss 3211

This theorem is referenced by:  frirrg  4445  2oconcl  6602  phplem4dom  7043  fidifsnen  7052  findcard  7070  findcard2  7071  findcard2s  7072  fisseneq  7119  difinfsn  7290  ismkvnex  7345  exmidfodomrlemim  7402