ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  0nelrel GIF version

Theorem 0nelrel 4729
Description: A binary relation does not contain the empty set. (Contributed by AV, 15-Nov-2021.)
Assertion
Ref Expression
0nelrel (Rel 𝑅 → ∅ ∉ 𝑅)

Proof of Theorem 0nelrel
StepHypRef Expression
1 df-rel 4690 . . . 4 (Rel 𝑅𝑅 ⊆ (V × V))
21biimpi 120 . . 3 (Rel 𝑅𝑅 ⊆ (V × V))
3 0nelxp 4711 . . . 4 ¬ ∅ ∈ (V × V)
43a1i 9 . . 3 (Rel 𝑅 → ¬ ∅ ∈ (V × V))
52, 4ssneldd 3200 . 2 (Rel 𝑅 → ¬ ∅ ∈ 𝑅)
6 df-nel 2473 . 2 (∅ ∉ 𝑅 ↔ ¬ ∅ ∈ 𝑅)
75, 6sylibr 134 1 (Rel 𝑅 → ∅ ∉ 𝑅)
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wi 4  wcel 2177  wnel 2472  Vcvv 2773  wss 3170  c0 3464   × cxp 4681  Rel wrel 4688
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 615  ax-in2 616  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-14 2180  ax-ext 2188  ax-sep 4170  ax-pow 4226  ax-pr 4261
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1485  df-sb 1787  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ne 2378  df-nel 2473  df-v 2775  df-dif 3172  df-un 3174  df-in 3176  df-ss 3183  df-nul 3465  df-pw 3623  df-sn 3644  df-pr 3645  df-op 3647  df-opab 4114  df-xp 4689  df-rel 4690
This theorem is referenced by:  0nelfun  5298
  Copyright terms: Public domain W3C validator