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Theorem umgrislfupgrdom 16286
Description: A multigraph is a loop-free pseudograph. (Contributed by AV, 27-Jan-2021.)
Hypotheses
Ref Expression
umgrislfupgr.v  |-  V  =  (Vtx `  G )
umgrislfupgr.i  |-  I  =  (iEdg `  G )
Assertion
Ref Expression
umgrislfupgrdom  |-  ( G  e. UMGraph 
<->  ( G  e. UPGraph  /\  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x } ) )
Distinct variable groups:    x, G    x, V
Allowed substitution hint:    I( x)

Proof of Theorem umgrislfupgrdom
StepHypRef Expression
1 umgrupgr 16267 . . 3  |-  ( G  e. UMGraph  ->  G  e. UPGraph )
2 umgrislfupgr.v . . . . 5  |-  V  =  (Vtx `  G )
3 umgrislfupgr.i . . . . 5  |-  I  =  (iEdg `  G )
42, 3umgrfen 16262 . . . 4  |-  ( G  e. UMGraph  ->  I : dom  I
--> { x  e.  ~P V  |  x  ~~  2o } )
5 id 19 . . . . 5  |-  ( I : dom  I --> { x  e.  ~P V  |  x 
~~  2o }  ->  I : dom  I --> { x  e.  ~P V  |  x 
~~  2o } )
6 ensymb 7057 . . . . . . . . 9  |-  ( 2o 
~~  x  <->  x  ~~  2o )
7 endom 7039 . . . . . . . . 9  |-  ( 2o 
~~  x  ->  2o  ~<_  x )
86, 7sylbir 135 . . . . . . . 8  |-  ( x 
~~  2o  ->  2o  ~<_  x )
98a1i 9 . . . . . . 7  |-  ( x  e.  ~P V  -> 
( x  ~~  2o  ->  2o  ~<_  x ) )
109ss2rabi 3330 . . . . . 6  |-  { x  e.  ~P V  |  x 
~~  2o }  C_  { x  e.  ~P V  |  2o  ~<_  x }
1110a1i 9 . . . . 5  |-  ( I : dom  I --> { x  e.  ~P V  |  x 
~~  2o }  ->  { x  e.  ~P V  |  x  ~~  2o }  C_ 
{ x  e.  ~P V  |  2o  ~<_  x }
)
125, 11fssd 5542 . . . 4  |-  ( I : dom  I --> { x  e.  ~P V  |  x 
~~  2o }  ->  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x } )
134, 12syl 14 . . 3  |-  ( G  e. UMGraph  ->  I : dom  I
--> { x  e.  ~P V  |  2o  ~<_  x }
)
141, 13jca 306 . 2  |-  ( G  e. UMGraph  ->  ( G  e. UPGraph  /\  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x }
) )
152, 3upgrfen 16252 . . . 4  |-  ( G  e. UPGraph  ->  I : dom  I
--> { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) } )
16 fin 5573 . . . . 5  |-  ( I : dom  I --> ( { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) }  i^i  { x  e.  ~P V  |  2o  ~<_  x } )  <->  ( I : dom  I --> { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) }  /\  I : dom  I
--> { x  e.  ~P V  |  2o  ~<_  x }
) )
17 umgrislfupgrenlem 16285 . . . . . 6  |-  ( { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) }  i^i  { x  e.  ~P V  |  2o  ~<_  x } )  =  {
x  e.  ~P V  |  x  ~~  2o }
18 feq3 5513 . . . . . 6  |-  ( ( { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) }  i^i  {
x  e.  ~P V  |  2o  ~<_  x }
)  =  { x  e.  ~P V  |  x 
~~  2o }  ->  ( I : dom  I --> ( { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) }  i^i  {
x  e.  ~P V  |  2o  ~<_  x }
)  <->  I : dom  I
--> { x  e.  ~P V  |  x  ~~  2o } ) )
1917, 18ax-mp 5 . . . . 5  |-  ( I : dom  I --> ( { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) }  i^i  { x  e.  ~P V  |  2o  ~<_  x } )  <->  I : dom  I --> { x  e. 
~P V  |  x 
~~  2o } )
2016, 19sylbb1 137 . . . 4  |-  ( ( I : dom  I --> { x  e.  ~P V  |  ( x  ~~  1o  \/  x  ~~  2o ) }  /\  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x } )  ->  I : dom  I --> { x  e.  ~P V  |  x 
~~  2o } )
2115, 20sylan 283 . . 3  |-  ( ( G  e. UPGraph  /\  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x } )  ->  I : dom  I --> { x  e.  ~P V  |  x 
~~  2o } )
222, 3isumgren 16260 . . . 4  |-  ( G  e. UPGraph  ->  ( G  e. UMGraph  <->  I : dom  I --> { x  e.  ~P V  |  x 
~~  2o } ) )
2322adantr 276 . . 3  |-  ( ( G  e. UPGraph  /\  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x } )  ->  ( G  e. UMGraph  <->  I : dom  I
--> { x  e.  ~P V  |  x  ~~  2o } ) )
2421, 23mpbird 167 . 2  |-  ( ( G  e. UPGraph  /\  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x } )  ->  G  e. UMGraph )
2514, 24impbii 126 1  |-  ( G  e. UMGraph 
<->  ( G  e. UPGraph  /\  I : dom  I --> { x  e.  ~P V  |  2o  ~<_  x } ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    \/ wo 720    = wceq 1402    e. wcel 2209   {crab 2532    i^i cin 3219    C_ wss 3220   ~Pcpw 3685   class class class wbr 4125   dom cdm 4769   -->wf 5368   ` cfv 5372   1oc1o 6670   2oc2o 6671    ~~ cen 7010    ~<_ cdom 7011  Vtxcvtx 16167  iEdgciedg 16168  UPGraphcupgr 16246  UMGraphcumgr 16247
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 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-14 2212  ax-ext 2220  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-i2m1 8274  ax-1rid 8276  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280
This theorem depends on definitions:  df-bi 117  df-dc 847  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-suc 4511  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-1o 6677  df-2o 6678  df-er 6797  df-en 7013  df-dom 7014  df-sub 8489  df-inn 9284  df-2 9342  df-3 9343  df-4 9344  df-5 9345  df-6 9346  df-7 9347  df-8 9348  df-9 9349  df-n0 9543  df-dec 9757  df-ndx 13333  df-slot 13334  df-base 13336  df-edgf 16160  df-vtx 16169  df-iedg 16170  df-upgren 16248  df-umgren 16249
This theorem is referenced by:  vtxdumgrfival  16453
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