Theorem cantnfp1 8461

Description: If 𝐹 is created by adding a single term (𝐹‘𝑋) = 𝑌 to 𝐺, where 𝑋 is larger than any element of the support of 𝐺, then 𝐹 is also a finitely supported function and it is assigned the value ((𝐴 ↑_𝑜 𝑋) ·_𝑜 𝑌) +_𝑜 𝑧 where 𝑧 is the value of 𝐺. (Contributed by Mario Carneiro, 28-May-2015.) (Revised by AV, 1-Jul-2019.)

Hypotheses

Ref	Expression
cantnfs.s	⊢ 𝑆 = dom (𝐴 CNF 𝐵)
cantnfs.a	⊢ (𝜑 → 𝐴 ∈ On)
cantnfs.b	⊢ (𝜑 → 𝐵 ∈ On)
cantnfp1.g	⊢ (𝜑 → 𝐺 ∈ 𝑆)
cantnfp1.x	⊢ (𝜑 → 𝑋 ∈ 𝐵)
cantnfp1.y	⊢ (𝜑 → 𝑌 ∈ 𝐴)
cantnfp1.s	⊢ (𝜑 → (𝐺 supp ∅) ⊆ 𝑋)
cantnfp1.f	⊢ 𝐹 = (𝑡 ∈ 𝐵 ↦ if(𝑡 = 𝑋, 𝑌, (𝐺‘𝑡)))

Assertion

Ref	Expression
cantnfp1	⊢ (𝜑 → (𝐹 ∈ 𝑆 ∧ ((𝐴 CNF 𝐵)‘𝐹) = (((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) +𝑜 ((𝐴 CNF 𝐵)‘𝐺))))

Distinct variable groups:   𝑡,𝐵   𝑡,𝐴   𝑡,𝑆   𝑡,𝐺   𝜑,𝑡   𝑡,𝑌   𝑡,𝑋

Allowed substitution hint:   𝐹(𝑡)

Proof of Theorem cantnfp1

Dummy variables 𝑘 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		cantnfp1.f	. . . . . 6 ⊢ 𝐹 = (𝑡 ∈ 𝐵 ↦ if(𝑡 = 𝑋, 𝑌, (𝐺‘𝑡)))
2		cantnfs.b	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐵 ∈ On)
3		cantnfp1.x	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
4		onelon 5665	. . . . . . . . . . . . 13 ⊢ ((𝐵 ∈ On ∧ 𝑋 ∈ 𝐵) → 𝑋 ∈ On)
5	2, 3, 4	syl2anc 691	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑋 ∈ On)
6		eloni 5650	. . . . . . . . . . . 12 ⊢ (𝑋 ∈ On → Ord 𝑋)
7		ordirr 5658	. . . . . . . . . . . 12 ⊢ (Ord 𝑋 → ¬ 𝑋 ∈ 𝑋)
8	5, 6, 7	3syl 18	. . . . . . . . . . 11 ⊢ (𝜑 → ¬ 𝑋 ∈ 𝑋)
9		fvex 6113	. . . . . . . . . . . . . 14 ⊢ (𝐺‘𝑋) ∈ V
10		dif1o 7467	. . . . . . . . . . . . . 14 ⊢ ((𝐺‘𝑋) ∈ (V ∖ 1𝑜) ↔ ((𝐺‘𝑋) ∈ V ∧ (𝐺‘𝑋) ≠ ∅))
11	9, 10	mpbiran 955	. . . . . . . . . . . . 13 ⊢ ((𝐺‘𝑋) ∈ (V ∖ 1𝑜) ↔ (𝐺‘𝑋) ≠ ∅)
12		cantnfp1.g	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 𝐺 ∈ 𝑆)
13		cantnfs.s	. . . . . . . . . . . . . . . . . . . . 21 ⊢ 𝑆 = dom (𝐴 CNF 𝐵)
14		cantnfs.a	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → 𝐴 ∈ On)
15	13, 14, 2	cantnfs 8446	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → (𝐺 ∈ 𝑆 ↔ (𝐺:𝐵⟶𝐴 ∧ 𝐺 finSupp ∅)))
16	12, 15	mpbid 221	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → (𝐺:𝐵⟶𝐴 ∧ 𝐺 finSupp ∅))
17	16	simpld 474	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → 𝐺:𝐵⟶𝐴)
18		ffn 5958	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐺:𝐵⟶𝐴 → 𝐺 Fn 𝐵)
19	17, 18	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝐺 Fn 𝐵)
20		0ex 4718	. . . . . . . . . . . . . . . . . 18 ⊢ ∅ ∈ V
21	20	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ∅ ∈ V)
22		elsuppfn 7190	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐺 Fn 𝐵 ∧ 𝐵 ∈ On ∧ ∅ ∈ V) → (𝑋 ∈ (𝐺 supp ∅) ↔ (𝑋 ∈ 𝐵 ∧ (𝐺‘𝑋) ≠ ∅)))
23	19, 2, 21, 22	syl3anc 1318	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑋 ∈ (𝐺 supp ∅) ↔ (𝑋 ∈ 𝐵 ∧ (𝐺‘𝑋) ≠ ∅)))
24	11	bicomi 213	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐺‘𝑋) ≠ ∅ ↔ (𝐺‘𝑋) ∈ (V ∖ 1𝑜))
25	24	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ((𝐺‘𝑋) ≠ ∅ ↔ (𝐺‘𝑋) ∈ (V ∖ 1𝑜)))
26	25	anbi2d 736	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ((𝑋 ∈ 𝐵 ∧ (𝐺‘𝑋) ≠ ∅) ↔ (𝑋 ∈ 𝐵 ∧ (𝐺‘𝑋) ∈ (V ∖ 1𝑜))))
27	23, 26	bitrd 267	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑋 ∈ (𝐺 supp ∅) ↔ (𝑋 ∈ 𝐵 ∧ (𝐺‘𝑋) ∈ (V ∖ 1𝑜))))
28		cantnfp1.s	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝐺 supp ∅) ⊆ 𝑋)
29	28	sseld 3567	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑋 ∈ (𝐺 supp ∅) → 𝑋 ∈ 𝑋))
30	27, 29	sylbird 249	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((𝑋 ∈ 𝐵 ∧ (𝐺‘𝑋) ∈ (V ∖ 1𝑜)) → 𝑋 ∈ 𝑋))
31	3, 30	mpand 707	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝐺‘𝑋) ∈ (V ∖ 1𝑜) → 𝑋 ∈ 𝑋))
32	11, 31	syl5bir 232	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝐺‘𝑋) ≠ ∅ → 𝑋 ∈ 𝑋))
33	32	necon1bd 2800	. . . . . . . . . . 11 ⊢ (𝜑 → (¬ 𝑋 ∈ 𝑋 → (𝐺‘𝑋) = ∅))
34	8, 33	mpd 15	. . . . . . . . . 10 ⊢ (𝜑 → (𝐺‘𝑋) = ∅)
35	34	ad3antrrr 762	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑌 = ∅) ∧ 𝑡 ∈ 𝐵) ∧ 𝑡 = 𝑋) → (𝐺‘𝑋) = ∅)
36		simpr 476	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑌 = ∅) ∧ 𝑡 ∈ 𝐵) ∧ 𝑡 = 𝑋) → 𝑡 = 𝑋)
37	36	fveq2d 6107	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑌 = ∅) ∧ 𝑡 ∈ 𝐵) ∧ 𝑡 = 𝑋) → (𝐺‘𝑡) = (𝐺‘𝑋))
38		simpllr 795	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑌 = ∅) ∧ 𝑡 ∈ 𝐵) ∧ 𝑡 = 𝑋) → 𝑌 = ∅)
39	35, 37, 38	3eqtr4rd 2655	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑌 = ∅) ∧ 𝑡 ∈ 𝐵) ∧ 𝑡 = 𝑋) → 𝑌 = (𝐺‘𝑡))
40		eqidd 2611	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑌 = ∅) ∧ 𝑡 ∈ 𝐵) ∧ ¬ 𝑡 = 𝑋) → (𝐺‘𝑡) = (𝐺‘𝑡))
41	39, 40	ifeqda 4071	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑌 = ∅) ∧ 𝑡 ∈ 𝐵) → if(𝑡 = 𝑋, 𝑌, (𝐺‘𝑡)) = (𝐺‘𝑡))
42	41	mpteq2dva 4672	. . . . . 6 ⊢ ((𝜑 ∧ 𝑌 = ∅) → (𝑡 ∈ 𝐵 ↦ if(𝑡 = 𝑋, 𝑌, (𝐺‘𝑡))) = (𝑡 ∈ 𝐵 ↦ (𝐺‘𝑡)))
43	1, 42	syl5eq 2656	. . . . 5 ⊢ ((𝜑 ∧ 𝑌 = ∅) → 𝐹 = (𝑡 ∈ 𝐵 ↦ (𝐺‘𝑡)))
44	17	feqmptd 6159	. . . . . 6 ⊢ (𝜑 → 𝐺 = (𝑡 ∈ 𝐵 ↦ (𝐺‘𝑡)))
45	44	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑌 = ∅) → 𝐺 = (𝑡 ∈ 𝐵 ↦ (𝐺‘𝑡)))
46	43, 45	eqtr4d 2647	. . . 4 ⊢ ((𝜑 ∧ 𝑌 = ∅) → 𝐹 = 𝐺)
47	12	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑌 = ∅) → 𝐺 ∈ 𝑆)
48	46, 47	eqeltrd 2688	. . 3 ⊢ ((𝜑 ∧ 𝑌 = ∅) → 𝐹 ∈ 𝑆)
49		oecl 7504	. . . . . . . 8 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ↑𝑜 𝐵) ∈ On)
50	14, 2, 49	syl2anc 691	. . . . . . 7 ⊢ (𝜑 → (𝐴 ↑𝑜 𝐵) ∈ On)
51	13, 14, 2	cantnff 8454	. . . . . . . 8 ⊢ (𝜑 → (𝐴 CNF 𝐵):𝑆⟶(𝐴 ↑𝑜 𝐵))
52	51, 12	ffvelrnd 6268	. . . . . . 7 ⊢ (𝜑 → ((𝐴 CNF 𝐵)‘𝐺) ∈ (𝐴 ↑𝑜 𝐵))
53		onelon 5665	. . . . . . 7 ⊢ (((𝐴 ↑𝑜 𝐵) ∈ On ∧ ((𝐴 CNF 𝐵)‘𝐺) ∈ (𝐴 ↑𝑜 𝐵)) → ((𝐴 CNF 𝐵)‘𝐺) ∈ On)
54	50, 52, 53	syl2anc 691	. . . . . 6 ⊢ (𝜑 → ((𝐴 CNF 𝐵)‘𝐺) ∈ On)
55	54	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑌 = ∅) → ((𝐴 CNF 𝐵)‘𝐺) ∈ On)
56		oa0r 7505	. . . . 5 ⊢ (((𝐴 CNF 𝐵)‘𝐺) ∈ On → (∅ +𝑜 ((𝐴 CNF 𝐵)‘𝐺)) = ((𝐴 CNF 𝐵)‘𝐺))
57	55, 56	syl 17	. . . 4 ⊢ ((𝜑 ∧ 𝑌 = ∅) → (∅ +𝑜 ((𝐴 CNF 𝐵)‘𝐺)) = ((𝐴 CNF 𝐵)‘𝐺))
58		oveq2 6557	. . . . . 6 ⊢ (𝑌 = ∅ → ((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) = ((𝐴 ↑𝑜 𝑋) ·𝑜 ∅))
59		oecl 7504	. . . . . . . 8 ⊢ ((𝐴 ∈ On ∧ 𝑋 ∈ On) → (𝐴 ↑𝑜 𝑋) ∈ On)
60	14, 5, 59	syl2anc 691	. . . . . . 7 ⊢ (𝜑 → (𝐴 ↑𝑜 𝑋) ∈ On)
61		om0 7484	. . . . . . 7 ⊢ ((𝐴 ↑𝑜 𝑋) ∈ On → ((𝐴 ↑𝑜 𝑋) ·𝑜 ∅) = ∅)
62	60, 61	syl 17	. . . . . 6 ⊢ (𝜑 → ((𝐴 ↑𝑜 𝑋) ·𝑜 ∅) = ∅)
63	58, 62	sylan9eqr 2666	. . . . 5 ⊢ ((𝜑 ∧ 𝑌 = ∅) → ((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) = ∅)
64	63	oveq1d 6564	. . . 4 ⊢ ((𝜑 ∧ 𝑌 = ∅) → (((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) +𝑜 ((𝐴 CNF 𝐵)‘𝐺)) = (∅ +𝑜 ((𝐴 CNF 𝐵)‘𝐺)))
65	46	fveq2d 6107	. . . 4 ⊢ ((𝜑 ∧ 𝑌 = ∅) → ((𝐴 CNF 𝐵)‘𝐹) = ((𝐴 CNF 𝐵)‘𝐺))
66	57, 64, 65	3eqtr4rd 2655	. . 3 ⊢ ((𝜑 ∧ 𝑌 = ∅) → ((𝐴 CNF 𝐵)‘𝐹) = (((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) +𝑜 ((𝐴 CNF 𝐵)‘𝐺)))
67	48, 66	jca 553	. 2 ⊢ ((𝜑 ∧ 𝑌 = ∅) → (𝐹 ∈ 𝑆 ∧ ((𝐴 CNF 𝐵)‘𝐹) = (((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) +𝑜 ((𝐴 CNF 𝐵)‘𝐺))))
68	14	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → 𝐴 ∈ On)
69	2	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → 𝐵 ∈ On)
70	12	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → 𝐺 ∈ 𝑆)
71	3	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → 𝑋 ∈ 𝐵)
72		cantnfp1.y	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ 𝐴)
73	72	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → 𝑌 ∈ 𝐴)
74	28	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → (𝐺 supp ∅) ⊆ 𝑋)
75	13, 68, 69, 70, 71, 73, 74, 1	cantnfp1lem1 8458	. . 3 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → 𝐹 ∈ 𝑆)
76		onelon 5665	. . . . . . 7 ⊢ ((𝐴 ∈ On ∧ 𝑌 ∈ 𝐴) → 𝑌 ∈ On)
77	14, 72, 76	syl2anc 691	. . . . . 6 ⊢ (𝜑 → 𝑌 ∈ On)
78		on0eln0 5697	. . . . . 6 ⊢ (𝑌 ∈ On → (∅ ∈ 𝑌 ↔ 𝑌 ≠ ∅))
79	77, 78	syl 17	. . . . 5 ⊢ (𝜑 → (∅ ∈ 𝑌 ↔ 𝑌 ≠ ∅))
80	79	biimpar 501	. . . 4 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → ∅ ∈ 𝑌)
81		eqid 2610	. . . 4 ⊢ OrdIso( E , (𝐹 supp ∅)) = OrdIso( E , (𝐹 supp ∅))
82		eqid 2610	. . . 4 ⊢ seq𝜔((𝑘 ∈ V, 𝑧 ∈ V ↦ (((𝐴 ↑𝑜 (OrdIso( E , (𝐹 supp ∅))‘𝑘)) ·𝑜 (𝐹‘(OrdIso( E , (𝐹 supp ∅))‘𝑘))) +𝑜 𝑧)), ∅) = seq𝜔((𝑘 ∈ V, 𝑧 ∈ V ↦ (((𝐴 ↑𝑜 (OrdIso( E , (𝐹 supp ∅))‘𝑘)) ·𝑜 (𝐹‘(OrdIso( E , (𝐹 supp ∅))‘𝑘))) +𝑜 𝑧)), ∅)
83		eqid 2610	. . . 4 ⊢ OrdIso( E , (𝐺 supp ∅)) = OrdIso( E , (𝐺 supp ∅))
84		eqid 2610	. . . 4 ⊢ seq𝜔((𝑘 ∈ V, 𝑧 ∈ V ↦ (((𝐴 ↑𝑜 (OrdIso( E , (𝐺 supp ∅))‘𝑘)) ·𝑜 (𝐺‘(OrdIso( E , (𝐺 supp ∅))‘𝑘))) +𝑜 𝑧)), ∅) = seq𝜔((𝑘 ∈ V, 𝑧 ∈ V ↦ (((𝐴 ↑𝑜 (OrdIso( E , (𝐺 supp ∅))‘𝑘)) ·𝑜 (𝐺‘(OrdIso( E , (𝐺 supp ∅))‘𝑘))) +𝑜 𝑧)), ∅)
85	13, 68, 69, 70, 71, 73, 74, 1, 80, 81, 82, 83, 84	cantnfp1lem3 8460	. . 3 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → ((𝐴 CNF 𝐵)‘𝐹) = (((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) +𝑜 ((𝐴 CNF 𝐵)‘𝐺)))
86	75, 85	jca 553	. 2 ⊢ ((𝜑 ∧ 𝑌 ≠ ∅) → (𝐹 ∈ 𝑆 ∧ ((𝐴 CNF 𝐵)‘𝐹) = (((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) +𝑜 ((𝐴 CNF 𝐵)‘𝐺))))
87	67, 86	pm2.61dane 2869	1 ⊢ (𝜑 → (𝐹 ∈ 𝑆 ∧ ((𝐴 CNF 𝐵)‘𝐹) = (((𝐴 ↑𝑜 𝑋) ·𝑜 𝑌) +𝑜 ((𝐴 CNF 𝐵)‘𝐺))))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977   ≠ wne 2780  Vcvv 3173   ∖ cdif 3537   ⊆ wss 3540  ∅c0 3874  ifcif 4036   class class class wbr 4583   ↦ cmpt 4643   E cep 4947  dom cdm 5038  Ord word 5639  Oncon0 5640   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ↦ cmpt2 6551   supp csupp 7182  seq_𝜔cseqom 7429  1_𝑜c1o 7440   +_𝑜 coa 7444   ·_𝑜 comu 7445   ↑_𝑜 coe 7446   finSupp cfsupp 8158  OrdIsocoi 8297   CNF ccnf 8441

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-fal 1481  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-se 4998  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-isom 5813  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-supp 7183  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-seqom 7430  df-1o 7447  df-2o 7448  df-oadd 7451  df-omul 7452  df-oexp 7453  df-er 7629  df-map 7746  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-fsupp 8159  df-oi 8298  df-cnf 8442

This theorem is referenced by:  cantnflem1d  8468  cantnflem1  8469  cantnflem3  8471