ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  difexg GIF version

Theorem difexg 4117
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 3243 . 2 (𝐴𝐵) ⊆ 𝐴
2 ssexg 4115 . 2 (((𝐴𝐵) ⊆ 𝐴𝐴𝑉) → (𝐴𝐵) ∈ V)
31, 2mpan 421 1 (𝐴𝑉 → (𝐴𝐵) ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2135  Vcvv 2721  cdif 3108  wss 3111
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-in1 604  ax-in2 605  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-ext 2146  ax-sep 4094
This theorem depends on definitions:  df-bi 116  df-tru 1345  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-v 2723  df-dif 3113  df-in 3117  df-ss 3124
This theorem is referenced by:  frirrg  4322  2oconcl  6398  phplem4dom  6819  fidifsnen  6827  findcard  6845  findcard2  6846  findcard2s  6847  fisseneq  6888  difinfsn  7056  ismkvnex  7110  exmidfodomrlemim  7148
  Copyright terms: Public domain W3C validator