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Theorem iscplgrnb 26312
Description: A graph is complete iff all vertices are neighbors of all vertices. (Contributed by AV, 1-Nov-2020.)
Hypothesis
Ref Expression
iscplgr.v  |-  V  =  (Vtx `  G )
Assertion
Ref Expression
iscplgrnb  |-  ( G  e.  W  ->  ( G  e. ComplGraph  <->  A. v  e.  V  A. n  e.  ( V  \  { v } ) n  e.  ( G NeighbVtx  v ) ) )
Distinct variable groups:    v, G    v, V    n, G, v   
n, V    v, W
Allowed substitution hint:    W( n)

Proof of Theorem iscplgrnb
StepHypRef Expression
1 iscplgr.v . . 3  |-  V  =  (Vtx `  G )
21iscplgr 26310 . 2  |-  ( G  e.  W  ->  ( G  e. ComplGraph  <->  A. v  e.  V  v  e.  (UnivVtx `  G
) ) )
31uvtxael 26288 . . . 4  |-  ( G  e.  W  ->  (
v  e.  (UnivVtx `  G
)  <->  ( v  e.  V  /\  A. n  e.  ( V  \  {
v } ) n  e.  ( G NeighbVtx  v ) ) ) )
43baibd 948 . . 3  |-  ( ( G  e.  W  /\  v  e.  V )  ->  ( v  e.  (UnivVtx `  G )  <->  A. n  e.  ( V  \  {
v } ) n  e.  ( G NeighbVtx  v ) ) )
54ralbidva 2985 . 2  |-  ( G  e.  W  ->  ( A. v  e.  V  v  e.  (UnivVtx `  G
)  <->  A. v  e.  V  A. n  e.  ( V  \  { v } ) n  e.  ( G NeighbVtx  v ) ) )
62, 5bitrd 268 1  |-  ( G  e.  W  ->  ( G  e. ComplGraph  <->  A. v  e.  V  A. n  e.  ( V  \  { v } ) n  e.  ( G NeighbVtx  v ) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 196    = wceq 1483    e. wcel 1990   A.wral 2912    \ cdif 3571   {csn 4177   ` cfv 5888  (class class class)co 6650  Vtxcvtx 25874   NeighbVtx cnbgr 26224  UnivVtxcuvtxa 26225  ComplGraphccplgr 26226
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-iota 5851  df-fun 5890  df-fv 5896  df-ov 6653  df-uvtxa 26230  df-cplgr 26231
This theorem is referenced by:  iscplgredg  26313  iscusgredg  26319  cplgr3v  26331
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