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Theorem djudom 7058
Description: Dominance law for disjoint union. (Contributed by Jim Kingdon, 25-Jul-2022.)
Assertion
Ref Expression
djudom  |-  ( ( A  ~<_  B  /\  C  ~<_  D )  ->  ( A C )  ~<_  ( B D ) )

Proof of Theorem djudom
Dummy variables  f  g  h are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 brdomi 6715 . . 3  |-  ( A  ~<_  B  ->  E. f 
f : A -1-1-> B
)
21adantr 274 . 2  |-  ( ( A  ~<_  B  /\  C  ~<_  D )  ->  E. f 
f : A -1-1-> B
)
3 brdomi 6715 . . . 4  |-  ( C  ~<_  D  ->  E. g 
g : C -1-1-> D
)
43ad2antlr 481 . . 3  |-  ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  ->  E. g  g : C -1-1-> D )
5 inlresf1 7026 . . . . . . . . 9  |-  (inl  |`  B ) : B -1-1-> ( B D )
6 simplr 520 . . . . . . . . 9  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
f : A -1-1-> B
)
7 f1co 5405 . . . . . . . . 9  |-  ( ( (inl  |`  B ) : B -1-1-> ( B D )  /\  f : A -1-1-> B )  ->  ( (inl  |`  B )  o.  f
) : A -1-1-> ( B D ) )
85, 6, 7sylancr 411 . . . . . . . 8  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( (inl  |`  B )  o.  f ) : A -1-1-> ( B D ) )
9 inrresf1 7027 . . . . . . . . 9  |-  (inr  |`  D ) : D -1-1-> ( B D )
10 simpr 109 . . . . . . . . 9  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
g : C -1-1-> D
)
11 f1co 5405 . . . . . . . . 9  |-  ( ( (inr  |`  D ) : D -1-1-> ( B D )  /\  g : C -1-1-> D )  ->  ( (inr  |`  D )  o.  g
) : C -1-1-> ( B D ) )
129, 10, 11sylancr 411 . . . . . . . 8  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( (inr  |`  D )  o.  g ) : C -1-1-> ( B D ) )
13 rnco 5110 . . . . . . . . . . 11  |-  ran  (
(inl  |`  B )  o.  f )  =  ran  ( (inl  |`  B )  |`  ran  f )
14 f1rn 5394 . . . . . . . . . . . . . 14  |-  ( f : A -1-1-> B  ->  ran  f  C_  B )
1514ad2antlr 481 . . . . . . . . . . . . 13  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  ran  f  C_  B )
16 resabs1 4913 . . . . . . . . . . . . 13  |-  ( ran  f  C_  B  ->  ( (inl  |`  B )  |`  ran  f )  =  (inl  |`  ran  f ) )
1715, 16syl 14 . . . . . . . . . . . 12  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( (inl  |`  B )  |`  ran  f )  =  (inl  |`  ran  f ) )
1817rneqd 4833 . . . . . . . . . . 11  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  ran  ( (inl  |`  B )  |`  ran  f )  =  ran  (inl  |`  ran  f
) )
1913, 18syl5eq 2211 . . . . . . . . . 10  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  ran  ( (inl  |`  B )  o.  f )  =  ran  (inl  |`  ran  f
) )
20 rnco 5110 . . . . . . . . . . 11  |-  ran  (
(inr  |`  D )  o.  g )  =  ran  ( (inr  |`  D )  |`  ran  g )
21 f1rn 5394 . . . . . . . . . . . . 13  |-  ( g : C -1-1-> D  ->  ran  g  C_  D )
22 resabs1 4913 . . . . . . . . . . . . 13  |-  ( ran  g  C_  D  ->  ( (inr  |`  D )  |`  ran  g )  =  (inr  |`  ran  g ) )
2310, 21, 223syl 17 . . . . . . . . . . . 12  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( (inr  |`  D )  |`  ran  g )  =  (inr  |`  ran  g ) )
2423rneqd 4833 . . . . . . . . . . 11  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  ran  ( (inr  |`  D )  |`  ran  g )  =  ran  (inr  |`  ran  g
) )
2520, 24syl5eq 2211 . . . . . . . . . 10  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  ran  ( (inr  |`  D )  o.  g )  =  ran  (inr  |`  ran  g
) )
2619, 25ineq12d 3324 . . . . . . . . 9  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( ran  ( (inl  |`  B )  o.  f
)  i^i  ran  ( (inr  |`  D )  o.  g
) )  =  ( ran  (inl  |`  ran  f
)  i^i  ran  (inr  |`  ran  g
) ) )
27 djuinr 7028 . . . . . . . . 9  |-  ( ran  (inl  |`  ran  f )  i^i  ran  (inr  |`  ran  g
) )  =  (/)
2826, 27eqtrdi 2215 . . . . . . . 8  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( ran  ( (inl  |`  B )  o.  f
)  i^i  ran  ( (inr  |`  D )  o.  g
) )  =  (/) )
298, 12, 28casef1 7055 . . . . . . 7  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) ) : ( A C )
-1-1-> ( B D )
)
30 f1f 5393 . . . . . . 7  |-  (case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) ) : ( A C )
-1-1-> ( B D )  -> case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) ) : ( A C ) --> ( B D )
)
3129, 30syl 14 . . . . . 6  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) ) : ( A C ) --> ( B D )
)
32 reldom 6711 . . . . . . . . 9  |-  Rel  ~<_
3332brrelex1i 4647 . . . . . . . 8  |-  ( A  ~<_  B  ->  A  e.  _V )
3433ad3antrrr 484 . . . . . . 7  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  A  e.  _V )
3532brrelex1i 4647 . . . . . . . 8  |-  ( C  ~<_  D  ->  C  e.  _V )
3635ad3antlr 485 . . . . . . 7  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  C  e.  _V )
37 djuex 7008 . . . . . . 7  |-  ( ( A  e.  _V  /\  C  e.  _V )  ->  ( A C )  e.  _V )
3834, 36, 37syl2anc 409 . . . . . 6  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( A C )  e.  _V )
39 fex 5714 . . . . . 6  |-  ( (case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) ) : ( A C ) --> ( B D )  /\  ( A C )  e.  _V )  -> case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) )  e. 
_V )
4031, 38, 39syl2anc 409 . . . . 5  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) )  e.  _V )
41 f1eq1 5388 . . . . . 6  |-  ( h  = case ( ( (inl  |`  B )  o.  f
) ,  ( (inr  |`  D )  o.  g
) )  ->  (
h : ( A C ) -1-1-> ( B D )  <-> case ( (
(inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) ) : ( A C ) -1-1-> ( B D )
) )
4241spcegv 2814 . . . . 5  |-  (case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) )  e.  _V  ->  (case ( ( (inl  |`  B )  o.  f ) ,  ( (inr  |`  D )  o.  g ) ) : ( A C )
-1-1-> ( B D )  ->  E. h  h : ( A C ) -1-1-> ( B D )
) )
4340, 29, 42sylc 62 . . . 4  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  E. h  h :
( A C ) -1-1-> ( B D )
)
4432brrelex2i 4648 . . . . . 6  |-  ( A  ~<_  B  ->  B  e.  _V )
4544ad3antrrr 484 . . . . 5  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  B  e.  _V )
4632brrelex2i 4648 . . . . . 6  |-  ( C  ~<_  D  ->  D  e.  _V )
4746ad3antlr 485 . . . . 5  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  ->  D  e.  _V )
48 djuex 7008 . . . . . 6  |-  ( ( B  e.  _V  /\  D  e.  _V )  ->  ( B D )  e.  _V )
49 brdomg 6714 . . . . . 6  |-  ( ( B D )  e.  _V  ->  ( ( A C )  ~<_  ( B D )  <->  E. h  h : ( A C ) -1-1-> ( B D ) ) )
5048, 49syl 14 . . . . 5  |-  ( ( B  e.  _V  /\  D  e.  _V )  ->  ( ( A C )  ~<_  ( B D )  <->  E. h  h : ( A C ) -1-1-> ( B D ) ) )
5145, 47, 50syl2anc 409 . . . 4  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( ( A C )  ~<_  ( B D )  <->  E. h  h : ( A C ) -1-1-> ( B D ) ) )
5243, 51mpbird 166 . . 3  |-  ( ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  /\  g : C -1-1-> D )  -> 
( A C )  ~<_  ( B D ) )
534, 52exlimddv 1886 . 2  |-  ( ( ( A  ~<_  B  /\  C  ~<_  D )  /\  f : A -1-1-> B )  ->  ( A C )  ~<_  ( B D )
)
542, 53exlimddv 1886 1  |-  ( ( A  ~<_  B  /\  C  ~<_  D )  ->  ( A C )  ~<_  ( B D ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    = wceq 1343   E.wex 1480    e. wcel 2136   _Vcvv 2726    i^i cin 3115    C_ wss 3116   (/)c0 3409   class class class wbr 3982   ran crn 4605    |` cres 4606    o. ccom 4608   -->wf 5184   -1-1->wf1 5185    ~<_ cdom 6705   ⊔ cdju 7002  inlcinl 7010  inrcinr 7011  casecdjucase 7048
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-coll 4097  ax-sep 4100  ax-nul 4108  ax-pow 4153  ax-pr 4187  ax-un 4411
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-fal 1349  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ne 2337  df-ral 2449  df-rex 2450  df-reu 2451  df-rab 2453  df-v 2728  df-sbc 2952  df-csb 3046  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-nul 3410  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-iun 3868  df-br 3983  df-opab 4044  df-mpt 4045  df-tr 4081  df-id 4271  df-iord 4344  df-on 4346  df-suc 4349  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-ima 4617  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-f1 5193  df-fo 5194  df-f1o 5195  df-fv 5196  df-1st 6108  df-2nd 6109  df-1o 6384  df-dom 6708  df-dju 7003  df-inl 7012  df-inr 7013  df-case 7049
This theorem is referenced by:  exmidfodomrlemr  7158  exmidfodomrlemrALT  7159  sbthom  13905
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