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Theorem rrxmvallem 24912

Description: Support of the function used for building the distance . (Contributed by Thierry Arnoux, 30-Jun-2019.)

**Hypothesis**
Ref	Expression
rrxmval.1	⊢ 𝑋 = {ℎ ∈ (ℝ ↑_m 𝐼) ∣ ℎ finSupp 0}

**Assertion**
Ref	Expression
rrxmvallem	⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) supp 0) ⊆ ((𝐹 supp 0) ∪ (𝐺 supp 0)))

Distinct variable groups: ℎ,𝐹,𝑘 ℎ,𝐺,𝑘 ℎ,𝐼,𝑘 ℎ,𝑉,𝑘 𝑘,𝑋 Allowed substitution hint: 𝑋(ℎ)

Proof of Theorem rrxmvallem Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simprl 769	. . . . . . . . . 10 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0)) → (𝐹‘𝑥) = 0)
2		0cn 11202	. . . . . . . . . 10 ⊢ 0 ∈ ℂ
3	1, 2	eqeltrdi 2841	. . . . . . . . 9 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0)) → (𝐹‘𝑥) ∈ ℂ)
4		simprr 771	. . . . . . . . . 10 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0)) → (𝐺‘𝑥) = 0)
5	1, 4	eqtr4d 2775	. . . . . . . . 9 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0)) → (𝐹‘𝑥) = (𝐺‘𝑥))
6	3, 5	subeq0bd 11636	. . . . . . . 8 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0)) → ((𝐹‘𝑥) − (𝐺‘𝑥)) = 0)
7	6	sq0id 14154	. . . . . . 7 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0)) → (((𝐹‘𝑥) − (𝐺‘𝑥))↑2) = 0)
8	7	ex 413	. . . . . 6 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0) → (((𝐹‘𝑥) − (𝐺‘𝑥))↑2) = 0))
9		ioran 982	. . . . . . . 8 ⊢ (¬ ((𝐹‘𝑥) ≠ 0 ∨ (𝐺‘𝑥) ≠ 0) ↔ (¬ (𝐹‘𝑥) ≠ 0 ∧ ¬ (𝐺‘𝑥) ≠ 0))
10		nne 2944	. . . . . . . . 9 ⊢ (¬ (𝐹‘𝑥) ≠ 0 ↔ (𝐹‘𝑥) = 0)
11		nne 2944	. . . . . . . . 9 ⊢ (¬ (𝐺‘𝑥) ≠ 0 ↔ (𝐺‘𝑥) = 0)
12	10, 11	anbi12i 627	. . . . . . . 8 ⊢ ((¬ (𝐹‘𝑥) ≠ 0 ∧ ¬ (𝐺‘𝑥) ≠ 0) ↔ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0))
13	9, 12	bitri 274	. . . . . . 7 ⊢ (¬ ((𝐹‘𝑥) ≠ 0 ∨ (𝐺‘𝑥) ≠ 0) ↔ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0))
14	13	a1i 11	. . . . . 6 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (¬ ((𝐹‘𝑥) ≠ 0 ∨ (𝐺‘𝑥) ≠ 0) ↔ ((𝐹‘𝑥) = 0 ∧ (𝐺‘𝑥) = 0)))
15		eqidd 2733	. . . . . . . . . 10 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) = (𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)))
16		simpr 485	. . . . . . . . . . . . 13 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ 𝑘 = 𝑥) → 𝑘 = 𝑥)
17	16	fveq2d 6892	. . . . . . . . . . . 12 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ 𝑘 = 𝑥) → (𝐹‘𝑘) = (𝐹‘𝑥))
18	16	fveq2d 6892	. . . . . . . . . . . 12 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ 𝑘 = 𝑥) → (𝐺‘𝑘) = (𝐺‘𝑥))
19	17, 18	oveq12d 7423	. . . . . . . . . . 11 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ 𝑘 = 𝑥) → ((𝐹‘𝑘) − (𝐺‘𝑘)) = ((𝐹‘𝑥) − (𝐺‘𝑥)))
20	19	oveq1d 7420	. . . . . . . . . 10 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) ∧ 𝑘 = 𝑥) → (((𝐹‘𝑘) − (𝐺‘𝑘))↑2) = (((𝐹‘𝑥) − (𝐺‘𝑥))↑2))
21		simpr 485	. . . . . . . . . 10 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → 𝑥 ∈ 𝐼)
22		ovex 7438	. . . . . . . . . . 11 ⊢ (((𝐹‘𝑥) − (𝐺‘𝑥))↑2) ∈ V
23	22	a1i 11	. . . . . . . . . 10 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (((𝐹‘𝑥) − (𝐺‘𝑥))↑2) ∈ V)
24	15, 20, 21, 23	fvmptd 7002	. . . . . . . . 9 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) = (((𝐹‘𝑥) − (𝐺‘𝑥))↑2))
25	24	neeq1d 3000	. . . . . . . 8 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0 ↔ (((𝐹‘𝑥) − (𝐺‘𝑥))↑2) ≠ 0))
26	25	bicomd 222	. . . . . . 7 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → ((((𝐹‘𝑥) − (𝐺‘𝑥))↑2) ≠ 0 ↔ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0))
27	26	necon1bbid 2980	. . . . . 6 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (¬ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0 ↔ (((𝐹‘𝑥) − (𝐺‘𝑥))↑2) = 0))
28	8, 14, 27	3imtr4d 293	. . . . 5 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (¬ ((𝐹‘𝑥) ≠ 0 ∨ (𝐺‘𝑥) ≠ 0) → ¬ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0))
29	28	con4d 115	. . . 4 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) ∧ 𝑥 ∈ 𝐼) → (((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0 → ((𝐹‘𝑥) ≠ 0 ∨ (𝐺‘𝑥) ≠ 0)))
30	29	ss2rabdv 4072	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → {𝑥 ∈ 𝐼 ∣ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0} ⊆ {𝑥 ∈ 𝐼 ∣ ((𝐹‘𝑥) ≠ 0 ∨ (𝐺‘𝑥) ≠ 0)})
31		unrab 4304	. . 3 ⊢ ({𝑥 ∈ 𝐼 ∣ (𝐹‘𝑥) ≠ 0} ∪ {𝑥 ∈ 𝐼 ∣ (𝐺‘𝑥) ≠ 0}) = {𝑥 ∈ 𝐼 ∣ ((𝐹‘𝑥) ≠ 0 ∨ (𝐺‘𝑥) ≠ 0)}
32	30, 31	sseqtrrdi 4032	. 2 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → {𝑥 ∈ 𝐼 ∣ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0} ⊆ ({𝑥 ∈ 𝐼 ∣ (𝐹‘𝑥) ≠ 0} ∪ {𝑥 ∈ 𝐼 ∣ (𝐺‘𝑥) ≠ 0}))
33		simp1 1136	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → 𝐼 ∈ 𝑉)
34		ovex 7438	. . . . 5 ⊢ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2) ∈ V
35		eqid 2732	. . . . 5 ⊢ (𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) = (𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))
36	34, 35	fnmpti 6690	. . . 4 ⊢ (𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) Fn 𝐼
37		suppvalfn 8150	. . . 4 ⊢ (((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) Fn 𝐼 ∧ 𝐼 ∈ 𝑉 ∧ 0 ∈ ℂ) → ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) supp 0) = {𝑥 ∈ 𝐼 ∣ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0})
38	36, 2, 37	mp3an13 1452	. . 3 ⊢ (𝐼 ∈ 𝑉 → ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) supp 0) = {𝑥 ∈ 𝐼 ∣ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0})
39	33, 38	syl 17	. 2 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) supp 0) = {𝑥 ∈ 𝐼 ∣ ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2))‘𝑥) ≠ 0})
40		elrabi 3676	. . . . . . 7 ⊢ (𝐹 ∈ {ℎ ∈ (ℝ ↑_m 𝐼) ∣ ℎ finSupp 0} → 𝐹 ∈ (ℝ ↑_m 𝐼))
41		rrxmval.1	. . . . . . 7 ⊢ 𝑋 = {ℎ ∈ (ℝ ↑_m 𝐼) ∣ ℎ finSupp 0}
42	40, 41	eleq2s 2851	. . . . . 6 ⊢ (𝐹 ∈ 𝑋 → 𝐹 ∈ (ℝ ↑_m 𝐼))
43		elmapi 8839	. . . . . 6 ⊢ (𝐹 ∈ (ℝ ↑_m 𝐼) → 𝐹:𝐼⟶ℝ)
44		ffn 6714	. . . . . 6 ⊢ (𝐹:𝐼⟶ℝ → 𝐹 Fn 𝐼)
45	42, 43, 44	3syl 18	. . . . 5 ⊢ (𝐹 ∈ 𝑋 → 𝐹 Fn 𝐼)
46	45	3ad2ant2 1134	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → 𝐹 Fn 𝐼)
47	2	a1i 11	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → 0 ∈ ℂ)
48		suppvalfn 8150	. . . 4 ⊢ ((𝐹 Fn 𝐼 ∧ 𝐼 ∈ 𝑉 ∧ 0 ∈ ℂ) → (𝐹 supp 0) = {𝑥 ∈ 𝐼 ∣ (𝐹‘𝑥) ≠ 0})
49	46, 33, 47, 48	syl3anc 1371	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → (𝐹 supp 0) = {𝑥 ∈ 𝐼 ∣ (𝐹‘𝑥) ≠ 0})
50		elrabi 3676	. . . . . . 7 ⊢ (𝐺 ∈ {ℎ ∈ (ℝ ↑_m 𝐼) ∣ ℎ finSupp 0} → 𝐺 ∈ (ℝ ↑_m 𝐼))
51	50, 41	eleq2s 2851	. . . . . 6 ⊢ (𝐺 ∈ 𝑋 → 𝐺 ∈ (ℝ ↑_m 𝐼))
52		elmapi 8839	. . . . . 6 ⊢ (𝐺 ∈ (ℝ ↑_m 𝐼) → 𝐺:𝐼⟶ℝ)
53		ffn 6714	. . . . . 6 ⊢ (𝐺:𝐼⟶ℝ → 𝐺 Fn 𝐼)
54	51, 52, 53	3syl 18	. . . . 5 ⊢ (𝐺 ∈ 𝑋 → 𝐺 Fn 𝐼)
55	54	3ad2ant3 1135	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → 𝐺 Fn 𝐼)
56		suppvalfn 8150	. . . 4 ⊢ ((𝐺 Fn 𝐼 ∧ 𝐼 ∈ 𝑉 ∧ 0 ∈ ℂ) → (𝐺 supp 0) = {𝑥 ∈ 𝐼 ∣ (𝐺‘𝑥) ≠ 0})
57	55, 33, 47, 56	syl3anc 1371	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → (𝐺 supp 0) = {𝑥 ∈ 𝐼 ∣ (𝐺‘𝑥) ≠ 0})
58	49, 57	uneq12d 4163	. 2 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → ((𝐹 supp 0) ∪ (𝐺 supp 0)) = ({𝑥 ∈ 𝐼 ∣ (𝐹‘𝑥) ≠ 0} ∪ {𝑥 ∈ 𝐼 ∣ (𝐺‘𝑥) ≠ 0}))
59	32, 39, 58	3sstr4d 4028	1 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹 ∈ 𝑋 ∧ 𝐺 ∈ 𝑋) → ((𝑘 ∈ 𝐼 ↦ (((𝐹‘𝑘) − (𝐺‘𝑘))↑2)) supp 0) ⊆ ((𝐹 supp 0) ∪ (𝐺 supp 0)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∨ wo 845 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 {crab 3432 Vcvv 3474 ∪ cun 3945 ⊆ wss 3947 class class class wbr 5147 ↦ cmpt 5230 Fn wfn 6535 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 supp csupp 8142 ↑_m cmap 8816 finSupp cfsupp 9357 ℂcc 11104 ℝcr 11105 0cc0 11106 − cmin 11440 2c2 12263 ↑cexp 14023

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-map 8818 df-en 8936 df-dom 8937 df-sdom 8938 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-2 12271 df-n0 12469 df-z 12555 df-uz 12819 df-seq 13963 df-exp 14024

This theorem is referenced by: rrxmval 24913

W3C validator