Theorem difexg 4224

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

Assertion

Ref	Expression
difexg	⊢ (𝐴 ∈ 𝑉 → (𝐴 ∖ 𝐵) ∈ V)

Proof of Theorem difexg

Step	Hyp	Ref	Expression
1		difss 3330	. 2 ⊢ (𝐴 ∖ 𝐵) ⊆ 𝐴
2		ssexg 4222	. 2 ⊢ (((𝐴 ∖ 𝐵) ⊆ 𝐴 ∧ 𝐴 ∈ 𝑉) → (𝐴 ∖ 𝐵) ∈ V)
3	1, 2	mpan 424	1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∖ 𝐵) ∈ V)

Syntax hints:   → wi 4   ∈ wcel 2200  Vcvv 2799   ∖ cdif 3194   ⊆ 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-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 4201

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-dif 3199  df-in 3203  df-ss 3210

This theorem is referenced by:  frirrg  4440  2oconcl  6583  phplem4dom  7019  fidifsnen  7028  findcard  7046  findcard2  7047  findcard2s  7048  fisseneq  7092  difinfsn  7263  ismkvnex  7318  exmidfodomrlemim  7375