Theorem updjudhcoinrg 7248

Description: The composition of the mapping of an element of the disjoint union to the value of the corresponding function and the right injection equals the second function. (Contributed by AV, 27-Jun-2022.)

Hypotheses

Ref	Expression
updjud.f	|- ( ph -> F : A --> C )
updjud.g	|- ( ph -> G : B --> C )
updjudhf.h	|- H = ( x e. ( A ⊔ B ) |-> if ( ( 1st ` x ) = (/) , ( F ` ( 2nd ` x ) ) , ( G ` ( 2nd ` x ) ) ) )

Assertion

Ref	Expression
updjudhcoinrg	|- ( ph -> ( H o. (inr |` B ) ) = G )

Distinct variable groups:   x, A   x, B   x, C   ph, x   x, F   x, G

Allowed substitution hint:   H( x)

Proof of Theorem updjudhcoinrg

Dummy variable b is distinct from all other variables.

Step	Hyp	Ref	Expression
1		updjud.f	. . . . 5 |- ( ph -> F : A --> C )
2		updjud.g	. . . . 5 |- ( ph -> G : B --> C )
3		updjudhf.h	. . . . 5 |- H = ( x e. ( A ⊔ B ) |-> if ( ( 1st ` x ) = (/) , ( F ` ( 2nd ` x ) ) , ( G ` ( 2nd ` x ) ) ) )
4	1, 2, 3	updjudhf 7246	. . . 4 |- ( ph -> H : ( A ⊔ B ) --> C )
5		ffn 5473	. . . 4 |- ( H : ( A ⊔ B ) --> C -> H Fn ( A ⊔ B ) )
6	4, 5	syl 14	. . 3 |- ( ph -> H Fn ( A ⊔ B ) )
7		inrresf1 7229	. . . 4 |- (inr |` B ) : B -1-1-> ( A ⊔ B )
8		f1fn 5533	. . . 4 |- ( (inr |` B ) : B -1-1-> ( A ⊔ B ) -> (inr |` B ) Fn B )
9	7, 8	mp1i 10	. . 3 |- ( ph -> (inr |` B ) Fn B )
10		f1f 5531	. . . . 5 |- ( (inr |` B ) : B -1-1-> ( A ⊔ B ) -> (inr |` B ) : B --> ( A ⊔ B ) )
11	7, 10	ax-mp 5	. . . 4 |- (inr |` B ) : B --> ( A ⊔ B )
12		frn 5482	. . . 4 |- ( (inr |` B ) : B --> ( A ⊔ B ) -> ran (inr |` B ) C_ ( A ⊔ B ) )
13	11, 12	mp1i 10	. . 3 |- ( ph -> ran (inr |` B ) C_ ( A ⊔ B ) )
14		fnco 5431	. . 3 |- ( ( H Fn ( A ⊔ B ) /\ (inr |` B ) Fn B /\ ran (inr |` B ) C_ ( A ⊔ B ) ) -> ( H o. (inr |` B ) ) Fn B )
15	6, 9, 13, 14	syl3anc 1271	. 2 |- ( ph -> ( H o. (inr |` B ) ) Fn B )
16		ffn 5473	. . 3 |- ( G : B --> C -> G Fn B )
17	2, 16	syl 14	. 2 |- ( ph -> G Fn B )
18		fvco2 5703	. . . 4 |- ( ( (inr |` B ) Fn B /\ b e. B ) -> ( ( H o. (inr |` B ) ) ` b ) = ( H ` ( (inr |` B ) ` b ) ) )
19	9, 18	sylan 283	. . 3 |- ( ( ph /\ b e. B ) -> ( ( H o. (inr |` B ) ) ` b ) = ( H ` ( (inr |` B ) ` b ) ) )
20		fvres 5651	. . . . . 6 |- ( b e. B -> ( (inr |` B ) ` b ) = (inr ` b ) )
21	20	adantl 277	. . . . 5 |- ( ( ph /\ b e. B ) -> ( (inr |` B ) ` b ) = (inr ` b ) )
22	21	fveq2d 5631	. . . 4 |- ( ( ph /\ b e. B ) -> ( H ` ( (inr |` B ) ` b ) ) = ( H ` (inr ` b ) ) )
23	3	a1i 9	. . . . 5 |- ( ( ph /\ b e. B ) -> H = ( x e. ( A ⊔ B ) |-> if ( ( 1st ` x ) = (/) , ( F ` ( 2nd ` x ) ) , ( G ` ( 2nd ` x ) ) ) ) )
24		fveq2 5627	. . . . . . . . 9 |- ( x = (inr ` b ) -> ( 1st ` x ) = ( 1st ` (inr ` b ) ) )
25	24	eqeq1d 2238	. . . . . . . 8 |- ( x = (inr ` b ) -> ( ( 1st ` x ) = (/) <-> ( 1st ` (inr ` b ) ) = (/) ) )
26		fveq2 5627	. . . . . . . . 9 |- ( x = (inr ` b ) -> ( 2nd ` x ) = ( 2nd ` (inr ` b ) ) )
27	26	fveq2d 5631	. . . . . . . 8 |- ( x = (inr ` b ) -> ( F ` ( 2nd ` x ) ) = ( F ` ( 2nd ` (inr ` b ) ) ) )
28	26	fveq2d 5631	. . . . . . . 8 |- ( x = (inr ` b ) -> ( G ` ( 2nd ` x ) ) = ( G ` ( 2nd ` (inr ` b ) ) ) )
29	25, 27, 28	ifbieq12d 3629	. . . . . . 7 |- ( x = (inr ` b ) -> if ( ( 1st ` x ) = (/) , ( F ` ( 2nd ` x ) ) , ( G ` ( 2nd ` x ) ) ) = if ( ( 1st ` (inr ` b ) ) = (/) , ( F ` ( 2nd ` (inr ` b ) ) ) , ( G ` ( 2nd ` (inr ` b ) ) ) ) )
30	29	adantl 277	. . . . . 6 |- ( ( ( ph /\ b e. B ) /\ x = (inr ` b ) ) -> if ( ( 1st ` x ) = (/) , ( F ` ( 2nd ` x ) ) , ( G ` ( 2nd ` x ) ) ) = if ( ( 1st ` (inr ` b ) ) = (/) , ( F ` ( 2nd ` (inr ` b ) ) ) , ( G ` ( 2nd ` (inr ` b ) ) ) ) )
31		1stinr 7243	. . . . . . . . . 10 |- ( b e. B -> ( 1st ` (inr ` b ) ) = 1o )
32		1n0 6578	. . . . . . . . . . . 12 |- 1o =/= (/)
33	32	neii 2402	. . . . . . . . . . 11 |- -. 1o = (/)
34		eqeq1 2236	. . . . . . . . . . 11 |- ( ( 1st ` (inr ` b ) ) = 1o -> ( ( 1st ` (inr ` b ) ) = (/) <-> 1o = (/) ) )
35	33, 34	mtbiri 679	. . . . . . . . . 10 |- ( ( 1st ` (inr ` b ) ) = 1o -> -. ( 1st ` (inr ` b ) ) = (/) )
36	31, 35	syl 14	. . . . . . . . 9 |- ( b e. B -> -. ( 1st ` (inr ` b ) ) = (/) )
37	36	adantl 277	. . . . . . . 8 |- ( ( ph /\ b e. B ) -> -. ( 1st ` (inr ` b ) ) = (/) )
38	37	adantr 276	. . . . . . 7 |- ( ( ( ph /\ b e. B ) /\ x = (inr ` b ) ) -> -. ( 1st ` (inr ` b ) ) = (/) )
39	38	iffalsed 3612	. . . . . 6 |- ( ( ( ph /\ b e. B ) /\ x = (inr ` b ) ) -> if ( ( 1st ` (inr ` b ) ) = (/) , ( F ` ( 2nd ` (inr ` b ) ) ) , ( G ` ( 2nd ` (inr ` b ) ) ) ) = ( G ` ( 2nd ` (inr ` b ) ) ) )
40	30, 39	eqtrd 2262	. . . . 5 |- ( ( ( ph /\ b e. B ) /\ x = (inr ` b ) ) -> if ( ( 1st ` x ) = (/) , ( F ` ( 2nd ` x ) ) , ( G ` ( 2nd ` x ) ) ) = ( G ` ( 2nd ` (inr ` b ) ) ) )
41		djurcl 7219	. . . . . 6 |- ( b e. B -> (inr ` b ) e. ( A ⊔ B ) )
42	41	adantl 277	. . . . 5 |- ( ( ph /\ b e. B ) -> (inr ` b ) e. ( A ⊔ B ) )
43	2	adantr 276	. . . . . 6 |- ( ( ph /\ b e. B ) -> G : B --> C )
44		2ndinr 7244	. . . . . . . 8 |- ( b e. B -> ( 2nd ` (inr ` b ) ) = b )
45	44	adantl 277	. . . . . . 7 |- ( ( ph /\ b e. B ) -> ( 2nd ` (inr ` b ) ) = b )
46		simpr 110	. . . . . . 7 |- ( ( ph /\ b e. B ) -> b e. B )
47	45, 46	eqeltrd 2306	. . . . . 6 |- ( ( ph /\ b e. B ) -> ( 2nd ` (inr ` b ) ) e. B )
48	43, 47	ffvelcdmd 5771	. . . . 5 |- ( ( ph /\ b e. B ) -> ( G ` ( 2nd ` (inr ` b ) ) ) e. C )
49	23, 40, 42, 48	fvmptd 5715	. . . 4 |- ( ( ph /\ b e. B ) -> ( H ` (inr ` b ) ) = ( G ` ( 2nd ` (inr ` b ) ) ) )
50	22, 49	eqtrd 2262	. . 3 |- ( ( ph /\ b e. B ) -> ( H ` ( (inr |` B ) ` b ) ) = ( G ` ( 2nd ` (inr ` b ) ) ) )
51	45	fveq2d 5631	. . 3 |- ( ( ph /\ b e. B ) -> ( G ` ( 2nd ` (inr ` b ) ) ) = ( G ` b ) )
52	19, 50, 51	3eqtrd 2266	. 2 |- ( ( ph /\ b e. B ) -> ( ( H o. (inr |` B ) ) ` b ) = ( G ` b ) )
53	15, 17, 52	eqfnfvd 5735	1 |- ( ph -> ( H o. (inr |` B ) ) = G )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   = wceq 1395   e. wcel 2200   C_ wss 3197   (/)c0 3491   ifcif 3602   |-> cmpt 4145   ran crn 4720   |` cres 4721   o. ccom 4723   Fn wfn 5313   -->wf 5314   -1-1->wf1 5315   ` cfv 5318   1stc1st 6284   2ndc2nd 6285   1oc1o 6555   ⊔ cdju 7204  inrcinr 7213

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-nul 4210  ax-pow 4258  ax-pr 4293  ax-un 4524

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-if 3603  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-mpt 4147  df-tr 4183  df-id 4384  df-iord 4457  df-on 4459  df-suc 4462  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-1st 6286  df-2nd 6287  df-1o 6562  df-dju 7205  df-inl 7214  df-inr 7215

This theorem is referenced by:  updjud  7249