ssscongptld - Metamath Proof Explorer

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Theorem ssscongptld 26563

Description: If two triangles have equal sides, one angle in one triangle has the same cosine as the corresponding angle in the other triangle. This is a partial form of the SSS congruence theorem.

This theorem is proven by using lawcos 26557 on both triangles to express one side in terms of the other two, and then equating these expressions and reducing this algebraically to get an equality of cosines of angles. (Contributed by David Moews, 28-Feb-2017.)

**Hypotheses**
Ref	Expression
ssscongptld.angdef	⊢ 𝐹 = (𝑥 ∈ (ℂ ∖ {0}), 𝑦 ∈ (ℂ ∖ {0}) ↦ (ℑ‘(log‘(𝑦 / 𝑥))))
ssscongptld.1	⊢ (𝜑 → 𝐴 ∈ ℂ)
ssscongptld.2	⊢ (𝜑 → 𝐵 ∈ ℂ)
ssscongptld.3	⊢ (𝜑 → 𝐶 ∈ ℂ)
ssscongptld.4	⊢ (𝜑 → 𝐷 ∈ ℂ)
ssscongptld.5	⊢ (𝜑 → 𝐸 ∈ ℂ)
ssscongptld.6	⊢ (𝜑 → 𝐺 ∈ ℂ)
ssscongptld.7	⊢ (𝜑 → 𝐴 ≠ 𝐵)
ssscongptld.8	⊢ (𝜑 → 𝐵 ≠ 𝐶)
ssscongptld.9	⊢ (𝜑 → 𝐷 ≠ 𝐸)
ssscongptld.10	⊢ (𝜑 → 𝐸 ≠ 𝐺)
ssscongptld.11	⊢ (𝜑 → (abs‘(𝐴 − 𝐵)) = (abs‘(𝐷 − 𝐸)))
ssscongptld.12	⊢ (𝜑 → (abs‘(𝐵 − 𝐶)) = (abs‘(𝐸 − 𝐺)))
ssscongptld.13	⊢ (𝜑 → (abs‘(𝐶 − 𝐴)) = (abs‘(𝐺 − 𝐷)))

**Assertion**
Ref	Expression
ssscongptld	⊢ (𝜑 → (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵))) = (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸))))

Distinct variable groups: 𝑥,𝑦,𝐴 𝑥,𝐵,𝑦 𝑥,𝐶,𝑦 𝑥,𝐷,𝑦 𝑥,𝐸,𝑦 𝑥,𝐺,𝑦 Allowed substitution hints: 𝜑(𝑥,𝑦) 𝐹(𝑥,𝑦)

**Proof of Theorem ssscongptld**
Step	Hyp	Ref	Expression
1		negpitopissre 26285	. . . . 5 ⊢ (-π(,]π) ⊆ ℝ
2		ax-resscn 11169	. . . . 5 ⊢ ℝ ⊆ ℂ
3	1, 2	sstri 3990	. . . 4 ⊢ (-π(,]π) ⊆ ℂ
4		ssscongptld.angdef	. . . . 5 ⊢ 𝐹 = (𝑥 ∈ (ℂ ∖ {0}), 𝑦 ∈ (ℂ ∖ {0}) ↦ (ℑ‘(log‘(𝑦 / 𝑥))))
5		ssscongptld.1	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℂ)
6		ssscongptld.2	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℂ)
7	5, 6	subcld 11575	. . . . 5 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℂ)
8		ssscongptld.7	. . . . . 6 ⊢ (𝜑 → 𝐴 ≠ 𝐵)
9	5, 6, 8	subne0d 11584	. . . . 5 ⊢ (𝜑 → (𝐴 − 𝐵) ≠ 0)
10		ssscongptld.3	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ℂ)
11	10, 6	subcld 11575	. . . . 5 ⊢ (𝜑 → (𝐶 − 𝐵) ∈ ℂ)
12		ssscongptld.8	. . . . . . 7 ⊢ (𝜑 → 𝐵 ≠ 𝐶)
13	12	necomd 2994	. . . . . 6 ⊢ (𝜑 → 𝐶 ≠ 𝐵)
14	10, 6, 13	subne0d 11584	. . . . 5 ⊢ (𝜑 → (𝐶 − 𝐵) ≠ 0)
15	4, 7, 9, 11, 14	angcld 26546	. . . 4 ⊢ (𝜑 → ((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)) ∈ (-π(,]π))
16	3, 15	sselid 3979	. . 3 ⊢ (𝜑 → ((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)) ∈ ℂ)
17	16	coscld 16078	. 2 ⊢ (𝜑 → (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵))) ∈ ℂ)
18		ssscongptld.4	. . . . . 6 ⊢ (𝜑 → 𝐷 ∈ ℂ)
19		ssscongptld.5	. . . . . 6 ⊢ (𝜑 → 𝐸 ∈ ℂ)
20	18, 19	subcld 11575	. . . . 5 ⊢ (𝜑 → (𝐷 − 𝐸) ∈ ℂ)
21		ssscongptld.9	. . . . . 6 ⊢ (𝜑 → 𝐷 ≠ 𝐸)
22	18, 19, 21	subne0d 11584	. . . . 5 ⊢ (𝜑 → (𝐷 − 𝐸) ≠ 0)
23		ssscongptld.6	. . . . . 6 ⊢ (𝜑 → 𝐺 ∈ ℂ)
24	23, 19	subcld 11575	. . . . 5 ⊢ (𝜑 → (𝐺 − 𝐸) ∈ ℂ)
25		ssscongptld.10	. . . . . . 7 ⊢ (𝜑 → 𝐸 ≠ 𝐺)
26	25	necomd 2994	. . . . . 6 ⊢ (𝜑 → 𝐺 ≠ 𝐸)
27	23, 19, 26	subne0d 11584	. . . . 5 ⊢ (𝜑 → (𝐺 − 𝐸) ≠ 0)
28	4, 20, 22, 24, 27	angcld 26546	. . . 4 ⊢ (𝜑 → ((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)) ∈ (-π(,]π))
29	3, 28	sselid 3979	. . 3 ⊢ (𝜑 → ((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)) ∈ ℂ)
30	29	coscld 16078	. 2 ⊢ (𝜑 → (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸))) ∈ ℂ)
31	20	abscld 15387	. . . 4 ⊢ (𝜑 → (abs‘(𝐷 − 𝐸)) ∈ ℝ)
32	31	recnd 11246	. . 3 ⊢ (𝜑 → (abs‘(𝐷 − 𝐸)) ∈ ℂ)
33	24	abscld 15387	. . . 4 ⊢ (𝜑 → (abs‘(𝐺 − 𝐸)) ∈ ℝ)
34	33	recnd 11246	. . 3 ⊢ (𝜑 → (abs‘(𝐺 − 𝐸)) ∈ ℂ)
35	32, 34	mulcld 11238	. 2 ⊢ (𝜑 → ((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) ∈ ℂ)
36	20, 22	absne0d 15398	. . 3 ⊢ (𝜑 → (abs‘(𝐷 − 𝐸)) ≠ 0)
37	24, 27	absne0d 15398	. . 3 ⊢ (𝜑 → (abs‘(𝐺 − 𝐸)) ≠ 0)
38	32, 34, 36, 37	mulne0d 11870	. 2 ⊢ (𝜑 → ((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) ≠ 0)
39		ssscongptld.11	. . . . 5 ⊢ (𝜑 → (abs‘(𝐴 − 𝐵)) = (abs‘(𝐷 − 𝐸)))
40		ssscongptld.12	. . . . . 6 ⊢ (𝜑 → (abs‘(𝐵 − 𝐶)) = (abs‘(𝐸 − 𝐺)))
41	10, 6	abssubd 15404	. . . . . 6 ⊢ (𝜑 → (abs‘(𝐶 − 𝐵)) = (abs‘(𝐵 − 𝐶)))
42	23, 19	abssubd 15404	. . . . . 6 ⊢ (𝜑 → (abs‘(𝐺 − 𝐸)) = (abs‘(𝐸 − 𝐺)))
43	40, 41, 42	3eqtr4d 2780	. . . . 5 ⊢ (𝜑 → (abs‘(𝐶 − 𝐵)) = (abs‘(𝐺 − 𝐸)))
44	39, 43	oveq12d 7429	. . . 4 ⊢ (𝜑 → ((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) = ((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))))
45	44	oveq1d 7426	. . 3 ⊢ (𝜑 → (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))) = (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))))
46	39, 32	eqeltrd 2831	. . . . . 6 ⊢ (𝜑 → (abs‘(𝐴 − 𝐵)) ∈ ℂ)
47	43, 34	eqeltrd 2831	. . . . . 6 ⊢ (𝜑 → (abs‘(𝐶 − 𝐵)) ∈ ℂ)
48	46, 47	mulcld 11238	. . . . 5 ⊢ (𝜑 → ((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) ∈ ℂ)
49	48, 17	mulcld 11238	. . . 4 ⊢ (𝜑 → (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))) ∈ ℂ)
50	35, 30	mulcld 11238	. . . 4 ⊢ (𝜑 → (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)))) ∈ ℂ)
51		2cnd 12294	. . . 4 ⊢ (𝜑 → 2 ∈ ℂ)
52		2ne0 12320	. . . . 5 ⊢ 2 ≠ 0
53	52	a1i 11	. . . 4 ⊢ (𝜑 → 2 ≠ 0)
54	32	sqcld 14113	. . . . . 6 ⊢ (𝜑 → ((abs‘(𝐷 − 𝐸))↑2) ∈ ℂ)
55	34	sqcld 14113	. . . . . 6 ⊢ (𝜑 → ((abs‘(𝐺 − 𝐸))↑2) ∈ ℂ)
56	54, 55	addcld 11237	. . . . 5 ⊢ (𝜑 → (((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)) ∈ ℂ)
57	51, 49	mulcld 11238	. . . . 5 ⊢ (𝜑 → (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵))))) ∈ ℂ)
58	51, 50	mulcld 11238	. . . . 5 ⊢ (𝜑 → (2 · (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸))))) ∈ ℂ)
59	39	oveq1d 7426	. . . . . . . 8 ⊢ (𝜑 → ((abs‘(𝐴 − 𝐵))↑2) = ((abs‘(𝐷 − 𝐸))↑2))
60	43	oveq1d 7426	. . . . . . . 8 ⊢ (𝜑 → ((abs‘(𝐶 − 𝐵))↑2) = ((abs‘(𝐺 − 𝐸))↑2))
61	59, 60	oveq12d 7429	. . . . . . 7 ⊢ (𝜑 → (((abs‘(𝐴 − 𝐵))↑2) + ((abs‘(𝐶 − 𝐵))↑2)) = (((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)))
62	61	oveq1d 7426	. . . . . 6 ⊢ (𝜑 → ((((abs‘(𝐴 − 𝐵))↑2) + ((abs‘(𝐶 − 𝐵))↑2)) − (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))))) = ((((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)) − (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))))))
63		ssscongptld.13	. . . . . . . 8 ⊢ (𝜑 → (abs‘(𝐶 − 𝐴)) = (abs‘(𝐺 − 𝐷)))
64	63	oveq1d 7426	. . . . . . 7 ⊢ (𝜑 → ((abs‘(𝐶 − 𝐴))↑2) = ((abs‘(𝐺 − 𝐷))↑2))
65		eqid 2730	. . . . . . . . 9 ⊢ (abs‘(𝐴 − 𝐵)) = (abs‘(𝐴 − 𝐵))
66		eqid 2730	. . . . . . . . 9 ⊢ (abs‘(𝐶 − 𝐵)) = (abs‘(𝐶 − 𝐵))
67		eqid 2730	. . . . . . . . 9 ⊢ (abs‘(𝐶 − 𝐴)) = (abs‘(𝐶 − 𝐴))
68		eqid 2730	. . . . . . . . 9 ⊢ ((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)) = ((𝐴 − 𝐵)𝐹(𝐶 − 𝐵))
69	4, 65, 66, 67, 68	lawcos 26557	. . . . . . . 8 ⊢ (((𝐶 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ≠ 𝐵 ∧ 𝐴 ≠ 𝐵)) → ((abs‘(𝐶 − 𝐴))↑2) = ((((abs‘(𝐴 − 𝐵))↑2) + ((abs‘(𝐶 − 𝐵))↑2)) − (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))))))
70	10, 5, 6, 13, 8, 69	syl32anc 1376	. . . . . . 7 ⊢ (𝜑 → ((abs‘(𝐶 − 𝐴))↑2) = ((((abs‘(𝐴 − 𝐵))↑2) + ((abs‘(𝐶 − 𝐵))↑2)) − (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))))))
71		eqid 2730	. . . . . . . . 9 ⊢ (abs‘(𝐷 − 𝐸)) = (abs‘(𝐷 − 𝐸))
72		eqid 2730	. . . . . . . . 9 ⊢ (abs‘(𝐺 − 𝐸)) = (abs‘(𝐺 − 𝐸))
73		eqid 2730	. . . . . . . . 9 ⊢ (abs‘(𝐺 − 𝐷)) = (abs‘(𝐺 − 𝐷))
74		eqid 2730	. . . . . . . . 9 ⊢ ((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)) = ((𝐷 − 𝐸)𝐹(𝐺 − 𝐸))
75	4, 71, 72, 73, 74	lawcos 26557	. . . . . . . 8 ⊢ (((𝐺 ∈ ℂ ∧ 𝐷 ∈ ℂ ∧ 𝐸 ∈ ℂ) ∧ (𝐺 ≠ 𝐸 ∧ 𝐷 ≠ 𝐸)) → ((abs‘(𝐺 − 𝐷))↑2) = ((((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)) − (2 · (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)))))))
76	23, 18, 19, 26, 21, 75	syl32anc 1376	. . . . . . 7 ⊢ (𝜑 → ((abs‘(𝐺 − 𝐷))↑2) = ((((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)) − (2 · (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)))))))
77	64, 70, 76	3eqtr3d 2778	. . . . . 6 ⊢ (𝜑 → ((((abs‘(𝐴 − 𝐵))↑2) + ((abs‘(𝐶 − 𝐵))↑2)) − (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))))) = ((((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)) − (2 · (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)))))))
78	62, 77	eqtr3d 2772	. . . . 5 ⊢ (𝜑 → ((((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)) − (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))))) = ((((abs‘(𝐷 − 𝐸))↑2) + ((abs‘(𝐺 − 𝐸))↑2)) − (2 · (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)))))))
79	56, 57, 58, 78	subcand 11616	. . . 4 ⊢ (𝜑 → (2 · (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵))))) = (2 · (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸))))))
80	49, 50, 51, 53, 79	mulcanad 11853	. . 3 ⊢ (𝜑 → (((abs‘(𝐴 − 𝐵)) · (abs‘(𝐶 − 𝐵))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))) = (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)))))
81	45, 80	eqtr3d 2772	. 2 ⊢ (𝜑 → (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵)))) = (((abs‘(𝐷 − 𝐸)) · (abs‘(𝐺 − 𝐸))) · (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸)))))
82	17, 30, 35, 38, 81	mulcanad 11853	1 ⊢ (𝜑 → (cos‘((𝐴 − 𝐵)𝐹(𝐶 − 𝐵))) = (cos‘((𝐷 − 𝐸)𝐹(𝐺 − 𝐸))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2104 ≠ wne 2938 ∖ cdif 3944 {csn 4627 ‘cfv 6542 (class class class)co 7411 ∈ cmpo 7413 ℂcc 11110 ℝcr 11111 0cc0 11112 + caddc 11115 · cmul 11117 − cmin 11448 -cneg 11449 / cdiv 11875 2c2 12271 (,]cioc 13329 ↑cexp 14031 ℑcim 15049 abscabs 15185 cosccos 16012 πcpi 16014 logclog 26299

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 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-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 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-se 5631 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 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-of 7672 df-om 7858 df-1st 7977 df-2nd 7978 df-supp 8149 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-2o 8469 df-er 8705 df-map 8824 df-pm 8825 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-fi 9408 df-sup 9439 df-inf 9440 df-oi 9507 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12979 df-xneg 13096 df-xadd 13097 df-xmul 13098 df-ioo 13332 df-ioc 13333 df-ico 13334 df-icc 13335 df-fz 13489 df-fzo 13632 df-fl 13761 df-mod 13839 df-seq 13971 df-exp 14032 df-fac 14238 df-bc 14267 df-hash 14295 df-shft 15018 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-limsup 15419 df-clim 15436 df-rlim 15437 df-sum 15637 df-ef 16015 df-sin 16017 df-cos 16018 df-pi 16020 df-struct 17084 df-sets 17101 df-slot 17119 df-ndx 17131 df-base 17149 df-ress 17178 df-plusg 17214 df-mulr 17215 df-starv 17216 df-sca 17217 df-vsca 17218 df-ip 17219 df-tset 17220 df-ple 17221 df-ds 17223 df-unif 17224 df-hom 17225 df-cco 17226 df-rest 17372 df-topn 17373 df-0g 17391 df-gsum 17392 df-topgen 17393 df-pt 17394 df-prds 17397 df-xrs 17452 df-qtop 17457 df-imas 17458 df-xps 17460 df-mre 17534 df-mrc 17535 df-acs 17537 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-submnd 18706 df-mulg 18987 df-cntz 19222 df-cmn 19691 df-psmet 21136 df-xmet 21137 df-met 21138 df-bl 21139 df-mopn 21140 df-fbas 21141 df-fg 21142 df-cnfld 21145 df-top 22616 df-topon 22633 df-topsp 22655 df-bases 22669 df-cld 22743 df-ntr 22744 df-cls 22745 df-nei 22822 df-lp 22860 df-perf 22861 df-cn 22951 df-cnp 22952 df-haus 23039 df-tx 23286 df-hmeo 23479 df-fil 23570 df-fm 23662 df-flim 23663 df-flf 23664 df-xms 24046 df-ms 24047 df-tms 24048 df-cncf 24618 df-limc 25615 df-dv 25616 df-log 26301

This theorem is referenced by: chordthmlem 26573

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