MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  uhgriedg0edg0 Structured version   Visualization version   GIF version

Theorem uhgriedg0edg0 27072
Description: A hypergraph has no edges iff its edge function is empty. (Contributed by AV, 21-Oct-2020.) (Proof shortened by AV, 8-Dec-2021.)
Assertion
Ref Expression
uhgriedg0edg0 (𝐺 ∈ UHGraph → ((Edg‘𝐺) = ∅ ↔ (iEdg‘𝐺) = ∅))

Proof of Theorem uhgriedg0edg0
StepHypRef Expression
1 eqid 2738 . . 3 (iEdg‘𝐺) = (iEdg‘𝐺)
21uhgrfun 27011 . 2 (𝐺 ∈ UHGraph → Fun (iEdg‘𝐺))
3 eqid 2738 . . 3 (Edg‘𝐺) = (Edg‘𝐺)
41, 3edg0iedg0 27000 . 2 (Fun (iEdg‘𝐺) → ((Edg‘𝐺) = ∅ ↔ (iEdg‘𝐺) = ∅))
52, 4syl 17 1 (𝐺 ∈ UHGraph → ((Edg‘𝐺) = ∅ ↔ (iEdg‘𝐺) = ∅))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209   = wceq 1542  wcel 2113  c0 4212  Fun wfun 6334  cfv 6340  iEdgciedg 26942  Edgcedg 26992  UHGraphcuhgr 27001
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1916  ax-6 1974  ax-7 2019  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2161  ax-12 2178  ax-ext 2710  ax-sep 5168  ax-nul 5175  ax-pr 5297  ax-un 7480
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2540  df-eu 2570  df-clab 2717  df-cleq 2730  df-clel 2811  df-nfc 2881  df-ne 2935  df-ral 3058  df-rex 3059  df-rab 3062  df-v 3400  df-sbc 3683  df-dif 3847  df-un 3849  df-in 3851  df-ss 3861  df-nul 4213  df-if 4416  df-pw 4491  df-sn 4518  df-pr 4520  df-op 4524  df-uni 4798  df-br 5032  df-opab 5094  df-mpt 5112  df-id 5430  df-xp 5532  df-rel 5533  df-cnv 5534  df-co 5535  df-dm 5536  df-rn 5537  df-iota 6298  df-fun 6342  df-fn 6343  df-f 6344  df-fv 6348  df-edg 26993  df-uhgr 27003
This theorem is referenced by:  uhgr0v0e  27180  uhgr0vusgr  27184  lfuhgr1v0e  27196  usgr1vr  27197  usgr1v0e  27268  uhgr0edg0rgr  27515  rgrusgrprc  27531
  Copyright terms: Public domain W3C validator