Theorem djudom 7423

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.

Step	Hyp	Ref	Expression
1		brdomi 7023	. . 3 |- ( A ~<_ B -> E. f f : A -1-1-> B )
2	1	adantr 276	. 2 |- ( ( A ~<_ B /\ C ~<_ D ) -> E. f f : A -1-1-> B )
3		brdomi 7023	. . . 4 |- ( C ~<_ D -> E. g g : C -1-1-> D )
4	3	ad2antlr 493	. . 3 |- ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) -> E. g g : C -1-1-> D )
5		inlresf1 7391	. . . . . . . . 9 |- (inl |` B ) : B -1-1-> ( B ⊔ D )
6		simplr 533	. . . . . . . . 9 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> f : A -1-1-> B )
7		f1co 5605	. . . . . . . . 9 |- ( ( (inl |` B ) : B -1-1-> ( B ⊔ D ) /\ f : A -1-1-> B ) -> ( (inl |` B ) o. f ) : A -1-1-> ( B ⊔ D ) )
8	5, 6, 7	sylancr 418	. . . . . . . 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 7392	. . . . . . . . 9 |- (inr |` D ) : D -1-1-> ( B ⊔ D )
10		simpr 110	. . . . . . . . 9 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> g : C -1-1-> D )
11		f1co 5605	. . . . . . . . 9 |- ( ( (inr |` D ) : D -1-1-> ( B ⊔ D ) /\ g : C -1-1-> D ) -> ( (inr |` D ) o. g ) : C -1-1-> ( B ⊔ D ) )
12	9, 10, 11	sylancr 418	. . . . . . . 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 5289	. . . . . . . . . . 11 |- ran ( (inl |` B ) o. f ) = ran ( (inl |` B ) |` ran f )
14		f1rn 5594	. . . . . . . . . . . . . 14 |- ( f : A -1-1-> B -> ran f C_ B )
15	14	ad2antlr 493	. . . . . . . . . . . . 13 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ran f C_ B )
16		resabs1 5087	. . . . . . . . . . . . 13 |- ( ran f C_ B -> ( (inl |` B ) |` ran f ) = (inl |` ran f ) )
17	15, 16	syl 14	. . . . . . . . . . . 12 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ( (inl |` B ) |` ran f ) = (inl |` ran f ) )
18	17	rneqd 5006	. . . . . . . . . . 11 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ran ( (inl |` B ) |` ran f ) = ran (inl |` ran f ) )
19	13, 18	eqtrid 2283	. . . . . . . . . 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 5289	. . . . . . . . . . 11 |- ran ( (inr |` D ) o. g ) = ran ( (inr |` D ) |` ran g )
21		f1rn 5594	. . . . . . . . . . . . 13 |- ( g : C -1-1-> D -> ran g C_ D )
22		resabs1 5087	. . . . . . . . . . . . 13 |- ( ran g C_ D -> ( (inr |` D ) |` ran g ) = (inr |` ran g ) )
23	10, 21, 22	3syl 17	. . . . . . . . . . . 12 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ( (inr |` D ) |` ran g ) = (inr |` ran g ) )
24	23	rneqd 5006	. . . . . . . . . . 11 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ran ( (inr |` D ) |` ran g ) = ran (inr |` ran g ) )
25	20, 24	eqtrid 2283	. . . . . . . . . 10 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ran ( (inr |` D ) o. g ) = ran (inr |` ran g ) )
26	19, 25	ineq12d 3433	. . . . . . . . 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 7393	. . . . . . . . 9 |- ( ran (inl |` ran f ) i^i ran (inr |` ran g ) ) = (/)
28	26, 27	eqtrdi 2287	. . . . . . . 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 ) ) = (/) )
29	8, 12, 28	casef1 7420	. . . . . . 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 5593	. . . . . . 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 ) )
31	29, 30	syl 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 7017	. . . . . . . . 9 |- Rel ~<_
33	32	brrelex1i 4813	. . . . . . . 8 |- ( A ~<_ B -> A e. _V )
34	33	ad3antrrr 496	. . . . . . 7 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> A e. _V )
35	32	brrelex1i 4813	. . . . . . . 8 |- ( C ~<_ D -> C e. _V )
36	35	ad3antlr 497	. . . . . . 7 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> C e. _V )
37		djuex 7373	. . . . . . 7 |- ( ( A e. _V /\ C e. _V ) -> ( A ⊔ C ) e. _V )
38	34, 36, 37	syl2anc 415	. . . . . 6 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ( A ⊔ C ) e. _V )
39		fex 5937	. . . . . 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 )
40	31, 38, 39	syl2anc 415	. . . . 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 5588	. . . . . 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 ) ) )
42	41	spcegv 2913	. . . . 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 ) ) )
43	40, 29, 42	sylc 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 ) )
44	32	brrelex2i 4814	. . . . . 6 |- ( A ~<_ B -> B e. _V )
45	44	ad3antrrr 496	. . . . 5 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> B e. _V )
46	32	brrelex2i 4814	. . . . . 6 |- ( C ~<_ D -> D e. _V )
47	46	ad3antlr 497	. . . . 5 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> D e. _V )
48		djuex 7373	. . . . . 6 |- ( ( B e. _V /\ D e. _V ) -> ( B ⊔ D ) e. _V )
49		brdomg 7022	. . . . . 6 |- ( ( B ⊔ D ) e. _V -> ( ( A ⊔ C ) ~<_ ( B ⊔ D ) <-> E. h h : ( A ⊔ C ) -1-1-> ( B ⊔ D ) ) )
50	48, 49	syl 14	. . . . 5 |- ( ( B e. _V /\ D e. _V ) -> ( ( A ⊔ C ) ~<_ ( B ⊔ D ) <-> E. h h : ( A ⊔ C ) -1-1-> ( B ⊔ D ) ) )
51	45, 47, 50	syl2anc 415	. . . 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 ) ) )
52	43, 51	mpbird 167	. . 3 |- ( ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) /\ g : C -1-1-> D ) -> ( A ⊔ C ) ~<_ ( B ⊔ D ) )
53	4, 52	exlimddv 1954	. 2 |- ( ( ( A ~<_ B /\ C ~<_ D ) /\ f : A -1-1-> B ) -> ( A ⊔ C ) ~<_ ( B ⊔ D ) )
54	2, 53	exlimddv 1954	1 |- ( ( A ~<_ B /\ C ~<_ D ) -> ( A ⊔ C ) ~<_ ( B ⊔ D ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1402   E.wex 1545   e. wcel 2209   _Vcvv 2821   i^i cin 3219   C_ wss 3220   (/)c0 3520   class class class wbr 4125   ran crn 4770   |` cres 4771   o. ccom 4773   -->wf 5368   -1-1->wf1 5369   ~<_ cdom 7011   ⊔ cdju 7367  inlcinl 7375  inrcinr 7376  casecdjucase 7413

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-coll 4241  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573

This theorem depends on definitions:  df-bi 117  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-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-iun 4009  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-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-1st 6364  df-2nd 6365  df-1o 6677  df-dom 7014  df-dju 7368  df-inl 7377  df-inr 7378  df-case 7414

This theorem is referenced by:  exmidfodomrlemr  7544  exmidfodomrlemrALT  7545  sbthom  16976