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

Theorem disjdif 3599
Description: A class and its relative complement are disjoint. Theorem 38 of [Suppes] p. 29. (Contributed by NM, 24-Mar-1998.)
Assertion
Ref Expression
disjdif (𝐴 ∩ (𝐵 ∖ 𝐴)) = ∅

Proof of Theorem disjdif
StepHypRef Expression
1 ssid 3268 . 2 𝐴 ⊆ 𝐴
2 disjdifg 3598 . 2 (𝐴 ⊆ 𝐴 → (𝐴 ∩ (𝐵 ∖ 𝐴)) = ∅)
31, 2ax-mp 5 1 (𝐴 ∩ (𝐵 ∖ 𝐴)) = ∅
Colors of variables:    wff set class
This proof depends on syntax axioms:   = wceq 1402   ∖ cdif 3217   ∩ cin 3219   ⊆ wss 3220  ∅c0 3520
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-dif 3222  df-in 3226  df-ss 3233  df-nul 3521
This theorem is used by:  disjdifr  3600  ssdifin0  3609  difdifdirss  3612  fvsnun1  5915  fvsnun2  5916  phplem2  7159  unfiin  7238  xpfi  7244  sbthlem7  7286  sbthlemi8  7287  exmidfodomrlemim  7560  fihashssdif  11282  hashf1lem2  11309  zfz1isolem1  11315  fsumlessfi  12253  fprodsplit1f  12427  setsfun  13446  setsfun0  13447  setsslid  13462
  Copyright terms: Public domain W3C validator