Theorem fundcmpsurbijinjpreimafv 44747

Description: Every function 𝐹:𝐴⟶𝐵 can be decomposed into a surjective function onto 𝑃, a bijective function from 𝑃 and an injective function into the codomain of 𝐹. (Contributed by AV, 22-Mar-2024.)

Hypothesis

Ref	Expression
fundcmpsurinj.p	⊢ 𝑃 = {𝑧 ∣ ∃𝑥 ∈ 𝐴 𝑧 = (◡𝐹 “ {(𝐹‘𝑥)})}

Assertion

Ref	Expression
fundcmpsurbijinjpreimafv	⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ∃𝑔∃ℎ∃𝑖((𝑔:𝐴–onto→𝑃 ∧ ℎ:𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ 𝑖:(𝐹 “ 𝐴)–1-1→𝐵) ∧ 𝐹 = ((𝑖 ∘ ℎ) ∘ 𝑔)))

Distinct variable groups:   𝑥,𝐴,𝑧   𝑥,𝐹,𝑧   𝐴,𝑖,𝑔,ℎ   𝐵,𝑔,ℎ,𝑖   𝑥,𝐵,𝑧   𝑖,𝐹,𝑔,ℎ   𝑃,𝑖,𝑔,ℎ   𝑥,𝑃,𝑔,ℎ   𝑥,𝑉

Allowed substitution hints:   𝑃(𝑧)   𝑉(𝑧,𝑔,ℎ,𝑖)

Proof of Theorem fundcmpsurbijinjpreimafv

Dummy variables 𝑎 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpr 484	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉)
2	1	mptexd 7082	. . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∈ V)
3		fundcmpsurinj.p	. . . . . 6 ⊢ 𝑃 = {𝑧 ∣ ∃𝑥 ∈ 𝐴 𝑧 = (◡𝐹 “ {(𝐹‘𝑥)})}
4	3	setpreimafvex 44723	. . . . 5 ⊢ (𝐴 ∈ 𝑉 → 𝑃 ∈ V)
5	4	adantl 481	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → 𝑃 ∈ V)
6	5	mptexd 7082	. . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∈ V)
7		ffun 6587	. . . . 5 ⊢ (𝐹:𝐴⟶𝐵 → Fun 𝐹)
8		funimaexg 6504	. . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ 𝑉) → (𝐹 “ 𝐴) ∈ V)
9	7, 8	sylan 579	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝐹 “ 𝐴) ∈ V)
10	9	resiexd 7074	. . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ( I ↾ (𝐹 “ 𝐴)) ∈ V)
11	2, 6, 10	3jca 1126	. 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ((𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∈ V ∧ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∈ V ∧ ( I ↾ (𝐹 “ 𝐴)) ∈ V))
12		ffn 6584	. . . . 5 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴)
13		fveq2 6756	. . . . . . . . 9 ⊢ (𝑎 = 𝑥 → (𝐹‘𝑎) = (𝐹‘𝑥))
14	13	sneqd 4570	. . . . . . . 8 ⊢ (𝑎 = 𝑥 → {(𝐹‘𝑎)} = {(𝐹‘𝑥)})
15	14	imaeq2d 5958	. . . . . . 7 ⊢ (𝑎 = 𝑥 → (◡𝐹 “ {(𝐹‘𝑎)}) = (◡𝐹 “ {(𝐹‘𝑥)}))
16	15	cbvmptv 5183	. . . . . 6 ⊢ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) = (𝑥 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑥)}))
17	3, 16	fundcmpsurinjlem2 44739	. . . . 5 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝑉) → (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃)
18	12, 17	sylan 579	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃)
19		eqid 2738	. . . . . 6 ⊢ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))
20	3, 19	imasetpreimafvbij 44746	. . . . 5 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝑉) → (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴))
21	12, 20	sylan 579	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴))
22		f1oi 6737	. . . . . 6 ⊢ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1-onto→(𝐹 “ 𝐴)
23		f1of1 6699	. . . . . 6 ⊢ (( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1-onto→(𝐹 “ 𝐴) → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→(𝐹 “ 𝐴))
24		fimass 6605	. . . . . . . 8 ⊢ (𝐹:𝐴⟶𝐵 → (𝐹 “ 𝐴) ⊆ 𝐵)
25		f1ss 6660	. . . . . . . 8 ⊢ ((( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→(𝐹 “ 𝐴) ∧ (𝐹 “ 𝐴) ⊆ 𝐵) → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵)
26	24, 25	sylan2 592	. . . . . . 7 ⊢ ((( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→(𝐹 “ 𝐴) ∧ 𝐹:𝐴⟶𝐵) → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵)
27	26	ex 412	. . . . . 6 ⊢ (( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→(𝐹 “ 𝐴) → (𝐹:𝐴⟶𝐵 → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵))
28	22, 23, 27	mp2b 10	. . . . 5 ⊢ (𝐹:𝐴⟶𝐵 → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵)
29	28	adantr 480	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵)
30	18, 21, 29	3jca 1126	. . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ((𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃 ∧ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵))
31	12	adantr 480	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → 𝐹 Fn 𝐴)
32		uniimaprimaeqfv 44722	. . . . . . . . 9 ⊢ ((𝐹 Fn 𝐴 ∧ 𝑎 ∈ 𝐴) → ∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)})) = (𝐹‘𝑎))
33	31, 32	sylan 579	. . . . . . . 8 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → ∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)})) = (𝐹‘𝑎))
34	33	fveq2d 6760	. . . . . . 7 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)}))) = (( I ↾ (𝐹 “ 𝐴))‘(𝐹‘𝑎)))
35	34	mpteq2dva 5170	. . . . . 6 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑎 ∈ 𝐴 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)})))) = (𝑎 ∈ 𝐴 ↦ (( I ↾ (𝐹 “ 𝐴))‘(𝐹‘𝑎))))
36		ffrn 6598	. . . . . . . . . 10 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹:𝐴⟶ran 𝐹)
37	36	adantr 480	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → 𝐹:𝐴⟶ran 𝐹)
38	37	funfvima2d 7090	. . . . . . . 8 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → (𝐹‘𝑎) ∈ (𝐹 “ 𝐴))
39		fvresi 7027	. . . . . . . 8 ⊢ ((𝐹‘𝑎) ∈ (𝐹 “ 𝐴) → (( I ↾ (𝐹 “ 𝐴))‘(𝐹‘𝑎)) = (𝐹‘𝑎))
40	38, 39	syl 17	. . . . . . 7 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → (( I ↾ (𝐹 “ 𝐴))‘(𝐹‘𝑎)) = (𝐹‘𝑎))
41	40	mpteq2dva 5170	. . . . . 6 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑎 ∈ 𝐴 ↦ (( I ↾ (𝐹 “ 𝐴))‘(𝐹‘𝑎))) = (𝑎 ∈ 𝐴 ↦ (𝐹‘𝑎)))
42	35, 41	eqtrd 2778	. . . . 5 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑎 ∈ 𝐴 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)})))) = (𝑎 ∈ 𝐴 ↦ (𝐹‘𝑎)))
43	12	ad2antrr 722	. . . . . . 7 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → 𝐹 Fn 𝐴)
44	1	adantr 480	. . . . . . 7 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → 𝐴 ∈ 𝑉)
45		simpr 484	. . . . . . 7 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → 𝑎 ∈ 𝐴)
46	3	preimafvelsetpreimafv 44728	. . . . . . 7 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝑉 ∧ 𝑎 ∈ 𝐴) → (◡𝐹 “ {(𝐹‘𝑎)}) ∈ 𝑃)
47	43, 44, 45, 46	syl3anc 1369	. . . . . 6 ⊢ (((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) ∧ 𝑎 ∈ 𝐴) → (◡𝐹 “ {(𝐹‘𝑎)}) ∈ 𝑃)
48		eqidd 2739	. . . . . 6 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})))
49		eqidd 2739	. . . . . 6 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))) = (𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))))
50		imaeq2 5954	. . . . . . . 8 ⊢ (𝑦 = (◡𝐹 “ {(𝐹‘𝑎)}) → (𝐹 “ 𝑦) = (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)})))
51	50	unieqd 4850	. . . . . . 7 ⊢ (𝑦 = (◡𝐹 “ {(𝐹‘𝑎)}) → ∪ (𝐹 “ 𝑦) = ∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)})))
52	51	fveq2d 6760	. . . . . 6 ⊢ (𝑦 = (◡𝐹 “ {(𝐹‘𝑎)}) → (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦)) = (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)}))))
53	47, 48, 49, 52	fmptco 6983	. . . . 5 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ((𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)}))) = (𝑎 ∈ 𝐴 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ (◡𝐹 “ {(𝐹‘𝑎)})))))
54		dffn5 6810	. . . . . . 7 ⊢ (𝐹 Fn 𝐴 ↔ 𝐹 = (𝑎 ∈ 𝐴 ↦ (𝐹‘𝑎)))
55	12, 54	sylib 217	. . . . . 6 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 = (𝑎 ∈ 𝐴 ↦ (𝐹‘𝑎)))
56	55	adantr 480	. . . . 5 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → 𝐹 = (𝑎 ∈ 𝐴 ↦ (𝐹‘𝑎)))
57	42, 53, 56	3eqtr4rd 2789	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → 𝐹 = ((𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)}))))
58		f1of 6700	. . . . . . . . . 10 ⊢ (( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1-onto→(𝐹 “ 𝐴) → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)⟶(𝐹 “ 𝐴))
59	22, 58	mp1i 13	. . . . . . . . 9 ⊢ (𝐹 Fn 𝐴 → ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)⟶(𝐹 “ 𝐴))
60		fnima 6547	. . . . . . . . . . 11 ⊢ (𝐹 Fn 𝐴 → (𝐹 “ 𝐴) = ran 𝐹)
61	60	eqcomd 2744	. . . . . . . . . 10 ⊢ (𝐹 Fn 𝐴 → ran 𝐹 = (𝐹 “ 𝐴))
62	61	feq2d 6570	. . . . . . . . 9 ⊢ (𝐹 Fn 𝐴 → (( I ↾ (𝐹 “ 𝐴)):ran 𝐹⟶(𝐹 “ 𝐴) ↔ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)⟶(𝐹 “ 𝐴)))
63	59, 62	mpbird 256	. . . . . . . 8 ⊢ (𝐹 Fn 𝐴 → ( I ↾ (𝐹 “ 𝐴)):ran 𝐹⟶(𝐹 “ 𝐴))
64	3	uniimaelsetpreimafv 44736	. . . . . . . 8 ⊢ ((𝐹 Fn 𝐴 ∧ 𝑦 ∈ 𝑃) → ∪ (𝐹 “ 𝑦) ∈ ran 𝐹)
65	63, 64	cofmpt 6986	. . . . . . 7 ⊢ (𝐹 Fn 𝐴 → (( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) = (𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))))
66	65	eqcomd 2744	. . . . . 6 ⊢ (𝐹 Fn 𝐴 → (𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))) = (( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))))
67	31, 66	syl 17	. . . . 5 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))) = (( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))))
68	67	coeq1d 5759	. . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ((𝑦 ∈ 𝑃 ↦ (( I ↾ (𝐹 “ 𝐴))‘∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)}))) = ((( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)}))))
69	57, 68	eqtrd 2778	. . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → 𝐹 = ((( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)}))))
70	30, 69	jca 511	. 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → (((𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃 ∧ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵) ∧ 𝐹 = ((( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})))))
71		foeq1 6668	. . . . . 6 ⊢ (𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) → (𝑔:𝐴–onto→𝑃 ↔ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃))
72	71	3ad2ant1 1131	. . . . 5 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → (𝑔:𝐴–onto→𝑃 ↔ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃))
73		f1oeq1 6688	. . . . . 6 ⊢ (ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) → (ℎ:𝑃–1-1-onto→(𝐹 “ 𝐴) ↔ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴)))
74	73	3ad2ant2 1132	. . . . 5 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → (ℎ:𝑃–1-1-onto→(𝐹 “ 𝐴) ↔ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴)))
75		f1eq1 6649	. . . . . 6 ⊢ (𝑖 = ( I ↾ (𝐹 “ 𝐴)) → (𝑖:(𝐹 “ 𝐴)–1-1→𝐵 ↔ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵))
76	75	3ad2ant3 1133	. . . . 5 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → (𝑖:(𝐹 “ 𝐴)–1-1→𝐵 ↔ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵))
77	72, 74, 76	3anbi123d 1434	. . . 4 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → ((𝑔:𝐴–onto→𝑃 ∧ ℎ:𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ 𝑖:(𝐹 “ 𝐴)–1-1→𝐵) ↔ ((𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃 ∧ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵)))
78		simp3 1136	. . . . . . 7 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → 𝑖 = ( I ↾ (𝐹 “ 𝐴)))
79		simp2 1135	. . . . . . 7 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)))
80	78, 79	coeq12d 5762	. . . . . 6 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → (𝑖 ∘ ℎ) = (( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))))
81		simp1 1134	. . . . . 6 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → 𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})))
82	80, 81	coeq12d 5762	. . . . 5 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → ((𝑖 ∘ ℎ) ∘ 𝑔) = ((( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)}))))
83	82	eqeq2d 2749	. . . 4 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → (𝐹 = ((𝑖 ∘ ℎ) ∘ 𝑔) ↔ 𝐹 = ((( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})))))
84	77, 83	anbi12d 630	. . 3 ⊢ ((𝑔 = (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∧ ℎ = (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∧ 𝑖 = ( I ↾ (𝐹 “ 𝐴))) → (((𝑔:𝐴–onto→𝑃 ∧ ℎ:𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ 𝑖:(𝐹 “ 𝐴)–1-1→𝐵) ∧ 𝐹 = ((𝑖 ∘ ℎ) ∘ 𝑔)) ↔ (((𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃 ∧ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵) ∧ 𝐹 = ((( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)}))))))
85	84	spc3egv 3532	. 2 ⊢ (((𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})) ∈ V ∧ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)) ∈ V ∧ ( I ↾ (𝐹 “ 𝐴)) ∈ V) → ((((𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})):𝐴–onto→𝑃 ∧ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦)):𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ ( I ↾ (𝐹 “ 𝐴)):(𝐹 “ 𝐴)–1-1→𝐵) ∧ 𝐹 = ((( I ↾ (𝐹 “ 𝐴)) ∘ (𝑦 ∈ 𝑃 ↦ ∪ (𝐹 “ 𝑦))) ∘ (𝑎 ∈ 𝐴 ↦ (◡𝐹 “ {(𝐹‘𝑎)})))) → ∃𝑔∃ℎ∃𝑖((𝑔:𝐴–onto→𝑃 ∧ ℎ:𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ 𝑖:(𝐹 “ 𝐴)–1-1→𝐵) ∧ 𝐹 = ((𝑖 ∘ ℎ) ∘ 𝑔))))
86	11, 70, 85	sylc 65	1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉) → ∃𝑔∃ℎ∃𝑖((𝑔:𝐴–onto→𝑃 ∧ ℎ:𝑃–1-1-onto→(𝐹 “ 𝐴) ∧ 𝑖:(𝐹 “ 𝐴)–1-1→𝐵) ∧ 𝐹 = ((𝑖 ∘ ℎ) ∘ 𝑔)))

Syntax hints:   → wi 4   ↔ wb 205   ∧ wa 395   ∧ w3a 1085   = wceq 1539  ∃wex 1783   ∈ wcel 2108  {cab 2715  ∃wrex 3064  Vcvv 3422   ⊆ wss 3883  {csn 4558  ∪ cuni 4836   ↦ cmpt 5153   I cid 5479  ^◡ccnv 5579  ran crn 5581   ↾ cres 5582   “ cima 5583   ∘ ccom 5584  Fun wfun 6412   Fn wfn 6413  ⟶wf 6414  –1-1→wf1 6415  –onto→wfo 6416  –1-1-onto→wf1o 6417  ‘cfv 6418

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-nel 3049  df-ral 3068  df-rex 3069  df-reu 3070  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426

This theorem is referenced by:  fundcmpsurinjpreimafv  44748  fundcmpsurbijinj  44750