chordthmlem4 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > chordthmlem4		Structured version Visualization version GIF version

Theorem chordthmlem4 25690

Description: If P is on the segment AB and M is the midpoint of AB, then PA · PB = BM ² − PM ² . If all lengths are reexpressed as fractions of AB, this reduces to the identity 𝑋 · (1 − 𝑋) = (1 / 2) ² − ((1 / 2) − 𝑋) ² . (Contributed by David Moews, 28-Feb-2017.)

**Hypotheses**
Ref	Expression
chordthmlem4.A	⊢ (𝜑 → 𝐴 ∈ ℂ)
chordthmlem4.B	⊢ (𝜑 → 𝐵 ∈ ℂ)
chordthmlem4.X	⊢ (𝜑 → 𝑋 ∈ (0[,]1))
chordthmlem4.M	⊢ (𝜑 → 𝑀 = ((𝐴 + 𝐵) / 2))
chordthmlem4.P	⊢ (𝜑 → 𝑃 = ((𝑋 · 𝐴) + ((1 − 𝑋) · 𝐵)))

**Assertion**
Ref	Expression
chordthmlem4	⊢ (𝜑 → ((abs‘(𝑃 − 𝐴)) · (abs‘(𝑃 − 𝐵))) = (((abs‘(𝐵 − 𝑀))↑2) − ((abs‘(𝑃 − 𝑀))↑2)))

**Proof of Theorem chordthmlem4**
Step	Hyp	Ref	Expression
1		1red 10817	. . . . . . . 8 ⊢ (𝜑 → 1 ∈ ℝ)
2		unitssre 13070	. . . . . . . . 9 ⊢ (0[,]1) ⊆ ℝ
3		chordthmlem4.X	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ∈ (0[,]1))
4	2, 3	sseldi 3889	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ ℝ)
5	1, 4	resubcld 11243	. . . . . . 7 ⊢ (𝜑 → (1 − 𝑋) ∈ ℝ)
6	5	recnd 10844	. . . . . 6 ⊢ (𝜑 → (1 − 𝑋) ∈ ℂ)
7	6	abscld 14983	. . . . 5 ⊢ (𝜑 → (abs‘(1 − 𝑋)) ∈ ℝ)
8	7	recnd 10844	. . . 4 ⊢ (𝜑 → (abs‘(1 − 𝑋)) ∈ ℂ)
9		chordthmlem4.B	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℂ)
10		chordthmlem4.A	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℂ)
11	9, 10	subcld 11172	. . . . . 6 ⊢ (𝜑 → (𝐵 − 𝐴) ∈ ℂ)
12	11	abscld 14983	. . . . 5 ⊢ (𝜑 → (abs‘(𝐵 − 𝐴)) ∈ ℝ)
13	12	recnd 10844	. . . 4 ⊢ (𝜑 → (abs‘(𝐵 − 𝐴)) ∈ ℂ)
14	4	recnd 10844	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ ℂ)
15	14	abscld 14983	. . . . 5 ⊢ (𝜑 → (abs‘𝑋) ∈ ℝ)
16	15	recnd 10844	. . . 4 ⊢ (𝜑 → (abs‘𝑋) ∈ ℂ)
17	8, 13, 16, 13	mul4d 11027	. . 3 ⊢ (𝜑 → (((abs‘(1 − 𝑋)) · (abs‘(𝐵 − 𝐴))) · ((abs‘𝑋) · (abs‘(𝐵 − 𝐴)))) = (((abs‘(1 − 𝑋)) · (abs‘𝑋)) · ((abs‘(𝐵 − 𝐴)) · (abs‘(𝐵 − 𝐴)))))
18		chordthmlem4.P	. . . . . . 7 ⊢ (𝜑 → 𝑃 = ((𝑋 · 𝐴) + ((1 − 𝑋) · 𝐵)))
19	14, 10	mulcld 10836	. . . . . . . . . 10 ⊢ (𝜑 → (𝑋 · 𝐴) ∈ ℂ)
20	6, 9	mulcld 10836	. . . . . . . . . 10 ⊢ (𝜑 → ((1 − 𝑋) · 𝐵) ∈ ℂ)
21	19, 20	addcld 10835	. . . . . . . . 9 ⊢ (𝜑 → ((𝑋 · 𝐴) + ((1 − 𝑋) · 𝐵)) ∈ ℂ)
22	18, 21	eqeltrd 2834	. . . . . . . 8 ⊢ (𝜑 → 𝑃 ∈ ℂ)
23	10, 22, 9, 14	affineequiv2 25679	. . . . . . 7 ⊢ (𝜑 → (𝑃 = ((𝑋 · 𝐴) + ((1 − 𝑋) · 𝐵)) ↔ (𝑃 − 𝐴) = ((1 − 𝑋) · (𝐵 − 𝐴))))
24	18, 23	mpbid 235	. . . . . 6 ⊢ (𝜑 → (𝑃 − 𝐴) = ((1 − 𝑋) · (𝐵 − 𝐴)))
25	24	fveq2d 6710	. . . . 5 ⊢ (𝜑 → (abs‘(𝑃 − 𝐴)) = (abs‘((1 − 𝑋) · (𝐵 − 𝐴))))
26	6, 11	absmuld 15001	. . . . 5 ⊢ (𝜑 → (abs‘((1 − 𝑋) · (𝐵 − 𝐴))) = ((abs‘(1 − 𝑋)) · (abs‘(𝐵 − 𝐴))))
27	25, 26	eqtrd 2774	. . . 4 ⊢ (𝜑 → (abs‘(𝑃 − 𝐴)) = ((abs‘(1 − 𝑋)) · (abs‘(𝐵 − 𝐴))))
28	22, 9	abssubd 15000	. . . . 5 ⊢ (𝜑 → (abs‘(𝑃 − 𝐵)) = (abs‘(𝐵 − 𝑃)))
29	10, 22, 9, 14	affineequiv 25678	. . . . . . 7 ⊢ (𝜑 → (𝑃 = ((𝑋 · 𝐴) + ((1 − 𝑋) · 𝐵)) ↔ (𝐵 − 𝑃) = (𝑋 · (𝐵 − 𝐴))))
30	18, 29	mpbid 235	. . . . . 6 ⊢ (𝜑 → (𝐵 − 𝑃) = (𝑋 · (𝐵 − 𝐴)))
31	30	fveq2d 6710	. . . . 5 ⊢ (𝜑 → (abs‘(𝐵 − 𝑃)) = (abs‘(𝑋 · (𝐵 − 𝐴))))
32	14, 11	absmuld 15001	. . . . 5 ⊢ (𝜑 → (abs‘(𝑋 · (𝐵 − 𝐴))) = ((abs‘𝑋) · (abs‘(𝐵 − 𝐴))))
33	28, 31, 32	3eqtrd 2778	. . . 4 ⊢ (𝜑 → (abs‘(𝑃 − 𝐵)) = ((abs‘𝑋) · (abs‘(𝐵 − 𝐴))))
34	27, 33	oveq12d 7220	. . 3 ⊢ (𝜑 → ((abs‘(𝑃 − 𝐴)) · (abs‘(𝑃 − 𝐵))) = (((abs‘(1 − 𝑋)) · (abs‘(𝐵 − 𝐴))) · ((abs‘𝑋) · (abs‘(𝐵 − 𝐴)))))
35	13	sqvald 13696	. . . 4 ⊢ (𝜑 → ((abs‘(𝐵 − 𝐴))↑2) = ((abs‘(𝐵 − 𝐴)) · (abs‘(𝐵 − 𝐴))))
36	35	oveq2d 7218	. . 3 ⊢ (𝜑 → (((abs‘(1 − 𝑋)) · (abs‘𝑋)) · ((abs‘(𝐵 − 𝐴))↑2)) = (((abs‘(1 − 𝑋)) · (abs‘𝑋)) · ((abs‘(𝐵 − 𝐴)) · (abs‘(𝐵 − 𝐴)))))
37	17, 34, 36	3eqtr4d 2784	. 2 ⊢ (𝜑 → ((abs‘(𝑃 − 𝐴)) · (abs‘(𝑃 − 𝐵))) = (((abs‘(1 − 𝑋)) · (abs‘𝑋)) · ((abs‘(𝐵 − 𝐴))↑2)))
38	1	recnd 10844	. . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ)
39	38	halfcld 12058	. . . . 5 ⊢ (𝜑 → (1 / 2) ∈ ℂ)
40	39	sqcld 13697	. . . 4 ⊢ (𝜑 → ((1 / 2)↑2) ∈ ℂ)
41	1	rehalfcld 12060	. . . . . . . . 9 ⊢ (𝜑 → (1 / 2) ∈ ℝ)
42	41, 4	resubcld 11243	. . . . . . . 8 ⊢ (𝜑 → ((1 / 2) − 𝑋) ∈ ℝ)
43	42	recnd 10844	. . . . . . 7 ⊢ (𝜑 → ((1 / 2) − 𝑋) ∈ ℂ)
44	43	abscld 14983	. . . . . 6 ⊢ (𝜑 → (abs‘((1 / 2) − 𝑋)) ∈ ℝ)
45	44	recnd 10844	. . . . 5 ⊢ (𝜑 → (abs‘((1 / 2) − 𝑋)) ∈ ℂ)
46	45	sqcld 13697	. . . 4 ⊢ (𝜑 → ((abs‘((1 / 2) − 𝑋))↑2) ∈ ℂ)
47	13	sqcld 13697	. . . 4 ⊢ (𝜑 → ((abs‘(𝐵 − 𝐴))↑2) ∈ ℂ)
48	40, 46, 47	subdird 11272	. . 3 ⊢ (𝜑 → ((((1 / 2)↑2) − ((abs‘((1 / 2) − 𝑋))↑2)) · ((abs‘(𝐵 − 𝐴))↑2)) = ((((1 / 2)↑2) · ((abs‘(𝐵 − 𝐴))↑2)) − (((abs‘((1 / 2) − 𝑋))↑2) · ((abs‘(𝐵 − 𝐴))↑2))))
49		subsq 13761	. . . . . . 7 ⊢ (((1 / 2) ∈ ℂ ∧ ((1 / 2) − 𝑋) ∈ ℂ) → (((1 / 2)↑2) − (((1 / 2) − 𝑋)↑2)) = (((1 / 2) + ((1 / 2) − 𝑋)) · ((1 / 2) − ((1 / 2) − 𝑋))))
50	39, 43, 49	syl2anc 587	. . . . . 6 ⊢ (𝜑 → (((1 / 2)↑2) − (((1 / 2) − 𝑋)↑2)) = (((1 / 2) + ((1 / 2) − 𝑋)) · ((1 / 2) − ((1 / 2) − 𝑋))))
51	39, 39, 14	addsubassd 11192	. . . . . . . 8 ⊢ (𝜑 → (((1 / 2) + (1 / 2)) − 𝑋) = ((1 / 2) + ((1 / 2) − 𝑋)))
52	38	2halvesd 12059	. . . . . . . . 9 ⊢ (𝜑 → ((1 / 2) + (1 / 2)) = 1)
53	52	oveq1d 7217	. . . . . . . 8 ⊢ (𝜑 → (((1 / 2) + (1 / 2)) − 𝑋) = (1 − 𝑋))
54	51, 53	eqtr3d 2776	. . . . . . 7 ⊢ (𝜑 → ((1 / 2) + ((1 / 2) − 𝑋)) = (1 − 𝑋))
55	39, 14	nncand 11177	. . . . . . 7 ⊢ (𝜑 → ((1 / 2) − ((1 / 2) − 𝑋)) = 𝑋)
56	54, 55	oveq12d 7220	. . . . . 6 ⊢ (𝜑 → (((1 / 2) + ((1 / 2) − 𝑋)) · ((1 / 2) − ((1 / 2) − 𝑋))) = ((1 − 𝑋) · 𝑋))
57	50, 56	eqtr2d 2775	. . . . 5 ⊢ (𝜑 → ((1 − 𝑋) · 𝑋) = (((1 / 2)↑2) − (((1 / 2) − 𝑋)↑2)))
58		elicc01 13037	. . . . . . . . 9 ⊢ (𝑋 ∈ (0[,]1) ↔ (𝑋 ∈ ℝ ∧ 0 ≤ 𝑋 ∧ 𝑋 ≤ 1))
59	3, 58	sylib 221	. . . . . . . 8 ⊢ (𝜑 → (𝑋 ∈ ℝ ∧ 0 ≤ 𝑋 ∧ 𝑋 ≤ 1))
60	59	simp3d 1146	. . . . . . 7 ⊢ (𝜑 → 𝑋 ≤ 1)
61	4, 1, 60	abssubge0d 14978	. . . . . 6 ⊢ (𝜑 → (abs‘(1 − 𝑋)) = (1 − 𝑋))
62	59	simp2d 1145	. . . . . . 7 ⊢ (𝜑 → 0 ≤ 𝑋)
63	4, 62	absidd 14969	. . . . . 6 ⊢ (𝜑 → (abs‘𝑋) = 𝑋)
64	61, 63	oveq12d 7220	. . . . 5 ⊢ (𝜑 → ((abs‘(1 − 𝑋)) · (abs‘𝑋)) = ((1 − 𝑋) · 𝑋))
65		absresq 14849	. . . . . . 7 ⊢ (((1 / 2) − 𝑋) ∈ ℝ → ((abs‘((1 / 2) − 𝑋))↑2) = (((1 / 2) − 𝑋)↑2))
66	42, 65	syl 17	. . . . . 6 ⊢ (𝜑 → ((abs‘((1 / 2) − 𝑋))↑2) = (((1 / 2) − 𝑋)↑2))
67	66	oveq2d 7218	. . . . 5 ⊢ (𝜑 → (((1 / 2)↑2) − ((abs‘((1 / 2) − 𝑋))↑2)) = (((1 / 2)↑2) − (((1 / 2) − 𝑋)↑2)))
68	57, 64, 67	3eqtr4d 2784	. . . 4 ⊢ (𝜑 → ((abs‘(1 − 𝑋)) · (abs‘𝑋)) = (((1 / 2)↑2) − ((abs‘((1 / 2) − 𝑋))↑2)))
69	68	oveq1d 7217	. . 3 ⊢ (𝜑 → (((abs‘(1 − 𝑋)) · (abs‘𝑋)) · ((abs‘(𝐵 − 𝐴))↑2)) = ((((1 / 2)↑2) − ((abs‘((1 / 2) − 𝑋))↑2)) · ((abs‘(𝐵 − 𝐴))↑2)))
70		2cnd 11891	. . . . . . . . . . . . 13 ⊢ (𝜑 → 2 ∈ ℂ)
71		2ne0 11917	. . . . . . . . . . . . . 14 ⊢ 2 ≠ 0
72	71	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → 2 ≠ 0)
73	9, 70, 72	divcan4d 11597	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝐵 · 2) / 2) = 𝐵)
74	9	times2d 12057	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐵 · 2) = (𝐵 + 𝐵))
75	74	oveq1d 7217	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝐵 · 2) / 2) = ((𝐵 + 𝐵) / 2))
76	73, 75	eqtr3d 2776	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐵 = ((𝐵 + 𝐵) / 2))
77		chordthmlem4.M	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑀 = ((𝐴 + 𝐵) / 2))
78	76, 77	oveq12d 7220	. . . . . . . . . 10 ⊢ (𝜑 → (𝐵 − 𝑀) = (((𝐵 + 𝐵) / 2) − ((𝐴 + 𝐵) / 2)))
79	9, 9	addcld 10835	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐵 + 𝐵) ∈ ℂ)
80	10, 9	addcld 10835	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐴 + 𝐵) ∈ ℂ)
81	79, 80, 70, 72	divsubdird 11630	. . . . . . . . . 10 ⊢ (𝜑 → (((𝐵 + 𝐵) − (𝐴 + 𝐵)) / 2) = (((𝐵 + 𝐵) / 2) − ((𝐴 + 𝐵) / 2)))
82	9, 10, 9	pnpcan2d 11210	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝐵 + 𝐵) − (𝐴 + 𝐵)) = (𝐵 − 𝐴))
83	82	oveq1d 7217	. . . . . . . . . 10 ⊢ (𝜑 → (((𝐵 + 𝐵) − (𝐴 + 𝐵)) / 2) = ((𝐵 − 𝐴) / 2))
84	78, 81, 83	3eqtr2d 2780	. . . . . . . . 9 ⊢ (𝜑 → (𝐵 − 𝑀) = ((𝐵 − 𝐴) / 2))
85	11, 70, 72	divrec2d 11595	. . . . . . . . 9 ⊢ (𝜑 → ((𝐵 − 𝐴) / 2) = ((1 / 2) · (𝐵 − 𝐴)))
86	84, 85	eqtrd 2774	. . . . . . . 8 ⊢ (𝜑 → (𝐵 − 𝑀) = ((1 / 2) · (𝐵 − 𝐴)))
87	86	fveq2d 6710	. . . . . . 7 ⊢ (𝜑 → (abs‘(𝐵 − 𝑀)) = (abs‘((1 / 2) · (𝐵 − 𝐴))))
88	39, 11	absmuld 15001	. . . . . . 7 ⊢ (𝜑 → (abs‘((1 / 2) · (𝐵 − 𝐴))) = ((abs‘(1 / 2)) · (abs‘(𝐵 − 𝐴))))
89		0red 10819	. . . . . . . . . 10 ⊢ (𝜑 → 0 ∈ ℝ)
90		halfgt0 12029	. . . . . . . . . . 11 ⊢ 0 < (1 / 2)
91	90	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → 0 < (1 / 2))
92	89, 41, 91	ltled 10963	. . . . . . . . 9 ⊢ (𝜑 → 0 ≤ (1 / 2))
93	41, 92	absidd 14969	. . . . . . . 8 ⊢ (𝜑 → (abs‘(1 / 2)) = (1 / 2))
94	93	oveq1d 7217	. . . . . . 7 ⊢ (𝜑 → ((abs‘(1 / 2)) · (abs‘(𝐵 − 𝐴))) = ((1 / 2) · (abs‘(𝐵 − 𝐴))))
95	87, 88, 94	3eqtrd 2778	. . . . . 6 ⊢ (𝜑 → (abs‘(𝐵 − 𝑀)) = ((1 / 2) · (abs‘(𝐵 − 𝐴))))
96	95	oveq1d 7217	. . . . 5 ⊢ (𝜑 → ((abs‘(𝐵 − 𝑀))↑2) = (((1 / 2) · (abs‘(𝐵 − 𝐴)))↑2))
97	39, 13	sqmuld 13711	. . . . 5 ⊢ (𝜑 → (((1 / 2) · (abs‘(𝐵 − 𝐴)))↑2) = (((1 / 2)↑2) · ((abs‘(𝐵 − 𝐴))↑2)))
98	96, 97	eqtrd 2774	. . . 4 ⊢ (𝜑 → ((abs‘(𝐵 − 𝑀))↑2) = (((1 / 2)↑2) · ((abs‘(𝐵 − 𝐴))↑2)))
99	39, 14, 11	subdird 11272	. . . . . . . . 9 ⊢ (𝜑 → (((1 / 2) − 𝑋) · (𝐵 − 𝐴)) = (((1 / 2) · (𝐵 − 𝐴)) − (𝑋 · (𝐵 − 𝐴))))
100	86, 30	oveq12d 7220	. . . . . . . . 9 ⊢ (𝜑 → ((𝐵 − 𝑀) − (𝐵 − 𝑃)) = (((1 / 2) · (𝐵 − 𝐴)) − (𝑋 · (𝐵 − 𝐴))))
101	80	halfcld 12058	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝐴 + 𝐵) / 2) ∈ ℂ)
102	77, 101	eqeltrd 2834	. . . . . . . . . 10 ⊢ (𝜑 → 𝑀 ∈ ℂ)
103	9, 102, 22	nnncan1d 11206	. . . . . . . . 9 ⊢ (𝜑 → ((𝐵 − 𝑀) − (𝐵 − 𝑃)) = (𝑃 − 𝑀))
104	99, 100, 103	3eqtr2rd 2781	. . . . . . . 8 ⊢ (𝜑 → (𝑃 − 𝑀) = (((1 / 2) − 𝑋) · (𝐵 − 𝐴)))
105	104	fveq2d 6710	. . . . . . 7 ⊢ (𝜑 → (abs‘(𝑃 − 𝑀)) = (abs‘(((1 / 2) − 𝑋) · (𝐵 − 𝐴))))
106	43, 11	absmuld 15001	. . . . . . 7 ⊢ (𝜑 → (abs‘(((1 / 2) − 𝑋) · (𝐵 − 𝐴))) = ((abs‘((1 / 2) − 𝑋)) · (abs‘(𝐵 − 𝐴))))
107	105, 106	eqtrd 2774	. . . . . 6 ⊢ (𝜑 → (abs‘(𝑃 − 𝑀)) = ((abs‘((1 / 2) − 𝑋)) · (abs‘(𝐵 − 𝐴))))
108	107	oveq1d 7217	. . . . 5 ⊢ (𝜑 → ((abs‘(𝑃 − 𝑀))↑2) = (((abs‘((1 / 2) − 𝑋)) · (abs‘(𝐵 − 𝐴)))↑2))
109	45, 13	sqmuld 13711	. . . . 5 ⊢ (𝜑 → (((abs‘((1 / 2) − 𝑋)) · (abs‘(𝐵 − 𝐴)))↑2) = (((abs‘((1 / 2) − 𝑋))↑2) · ((abs‘(𝐵 − 𝐴))↑2)))
110	108, 109	eqtrd 2774	. . . 4 ⊢ (𝜑 → ((abs‘(𝑃 − 𝑀))↑2) = (((abs‘((1 / 2) − 𝑋))↑2) · ((abs‘(𝐵 − 𝐴))↑2)))
111	98, 110	oveq12d 7220	. . 3 ⊢ (𝜑 → (((abs‘(𝐵 − 𝑀))↑2) − ((abs‘(𝑃 − 𝑀))↑2)) = ((((1 / 2)↑2) · ((abs‘(𝐵 − 𝐴))↑2)) − (((abs‘((1 / 2) − 𝑋))↑2) · ((abs‘(𝐵 − 𝐴))↑2))))
112	48, 69, 111	3eqtr4rd 2785	. 2 ⊢ (𝜑 → (((abs‘(𝐵 − 𝑀))↑2) − ((abs‘(𝑃 − 𝑀))↑2)) = (((abs‘(1 − 𝑋)) · (abs‘𝑋)) · ((abs‘(𝐵 − 𝐴))↑2)))
113	37, 112	eqtr4d 2777	1 ⊢ (𝜑 → ((abs‘(𝑃 − 𝐴)) · (abs‘(𝑃 − 𝐵))) = (((abs‘(𝐵 − 𝑀))↑2) − ((abs‘(𝑃 − 𝑀))↑2)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ w3a 1089 = wceq 1543 ∈ wcel 2110 ≠ wne 2935 class class class wbr 5043 ‘cfv 6369 (class class class)co 7202 ℂcc 10710 ℝcr 10711 0cc0 10712 1c1 10713 + caddc 10715 · cmul 10717 < clt 10850 ≤ cle 10851 − cmin 11045 / cdiv 11472 2c2 11868 [,]cicc 12921 ↑cexp 13618 abscabs 14780

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2706 ax-sep 5181 ax-nul 5188 ax-pow 5247 ax-pr 5311 ax-un 7512 ax-cnex 10768 ax-resscn 10769 ax-1cn 10770 ax-icn 10771 ax-addcl 10772 ax-addrcl 10773 ax-mulcl 10774 ax-mulrcl 10775 ax-mulcom 10776 ax-addass 10777 ax-mulass 10778 ax-distr 10779 ax-i2m1 10780 ax-1ne0 10781 ax-1rid 10782 ax-rnegex 10783 ax-rrecex 10784 ax-cnre 10785 ax-pre-lttri 10786 ax-pre-lttrn 10787 ax-pre-ltadd 10788 ax-pre-mulgt0 10789 ax-pre-sup 10790

This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2537 df-eu 2566 df-clab 2713 df-cleq 2726 df-clel 2812 df-nfc 2882 df-ne 2936 df-nel 3040 df-ral 3059 df-rex 3060 df-reu 3061 df-rmo 3062 df-rab 3063 df-v 3403 df-sbc 3688 df-csb 3803 df-dif 3860 df-un 3862 df-in 3864 df-ss 3874 df-pss 3876 df-nul 4228 df-if 4430 df-pw 4505 df-sn 4532 df-pr 4534 df-tp 4536 df-op 4538 df-uni 4810 df-iun 4896 df-br 5044 df-opab 5106 df-mpt 5125 df-tr 5151 df-id 5444 df-eprel 5449 df-po 5457 df-so 5458 df-fr 5498 df-we 5500 df-xp 5546 df-rel 5547 df-cnv 5548 df-co 5549 df-dm 5550 df-rn 5551 df-res 5552 df-ima 5553 df-pred 6149 df-ord 6205 df-on 6206 df-lim 6207 df-suc 6208 df-iota 6327 df-fun 6371 df-fn 6372 df-f 6373 df-f1 6374 df-fo 6375 df-f1o 6376 df-fv 6377 df-riota 7159 df-ov 7205 df-oprab 7206 df-mpo 7207 df-om 7634 df-2nd 7751 df-wrecs 8036 df-recs 8097 df-rdg 8135 df-er 8380 df-en 8616 df-dom 8617 df-sdom 8618 df-sup 9047 df-pnf 10852 df-mnf 10853 df-xr 10854 df-ltxr 10855 df-le 10856 df-sub 11047 df-neg 11048 df-div 11473 df-nn 11814 df-2 11876 df-3 11877 df-n0 12074 df-z 12160 df-uz 12422 df-rp 12570 df-icc 12925 df-seq 13558 df-exp 13619 df-cj 14645 df-re 14646 df-im 14647 df-sqrt 14781 df-abs 14782

This theorem is referenced by: chordthmlem5 25691

W3C validator