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Theorem ivthdec 14092

Description: The intermediate value theorem, decreasing case, for a strictly monotonic function. (Contributed by Jim Kingdon, 20-Feb-2024.)

**Hypotheses**
Ref	Expression
ivth.1	⊢ (𝜑 → 𝐴 ∈ ℝ)
ivth.2	⊢ (𝜑 → 𝐵 ∈ ℝ)
ivth.3	⊢ (𝜑 → 𝑈 ∈ ℝ)
ivth.4	⊢ (𝜑 → 𝐴 < 𝐵)
ivth.5	⊢ (𝜑 → (𝐴[,]𝐵) ⊆ 𝐷)
ivth.7	⊢ (𝜑 → 𝐹 ∈ (𝐷–cn→ℂ))
ivth.8	⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ)
ivthdec.9	⊢ (𝜑 → ((𝐹‘𝐵) < 𝑈 ∧ 𝑈 < (𝐹‘𝐴)))
ivthdec.i	⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → (𝐹‘𝑦) < (𝐹‘𝑥))

**Assertion**
Ref	Expression
ivthdec	⊢ (𝜑 → ∃𝑐 ∈ (𝐴(,)𝐵)(𝐹‘𝑐) = 𝑈)

Distinct variable groups: 𝐴,𝑐,𝑥 𝑦,𝐴,𝑥 𝐵,𝑐,𝑥 𝑦,𝐵 𝐷,𝑐,𝑥 𝑦,𝐷 𝐹,𝑐,𝑥 𝑦,𝐹 𝑈,𝑐,𝑥 𝑦,𝑈 𝜑,𝑐,𝑥 𝜑,𝑦

Proof of Theorem ivthdec Dummy variable 𝑤 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ivth.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ)
2		ivth.2	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ)
3		ivth.3	. . . 4 ⊢ (𝜑 → 𝑈 ∈ ℝ)
4	3	renegcld 8336	. . 3 ⊢ (𝜑 → -𝑈 ∈ ℝ)
5		ivth.4	. . 3 ⊢ (𝜑 → 𝐴 < 𝐵)
6		ivth.5	. . 3 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ 𝐷)
7		ivth.7	. . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐷–cn→ℂ))
8		eqid 2177	. . . . 5 ⊢ (𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤)) = (𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))
9	8	negfcncf 14059	. . . 4 ⊢ (𝐹 ∈ (𝐷–cn→ℂ) → (𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤)) ∈ (𝐷–cn→ℂ))
10	7, 9	syl 14	. . 3 ⊢ (𝜑 → (𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤)) ∈ (𝐷–cn→ℂ))
11		fveq2 5515	. . . . . 6 ⊢ (𝑤 = 𝑥 → (𝐹‘𝑤) = (𝐹‘𝑥))
12	11	negeqd 8151	. . . . 5 ⊢ (𝑤 = 𝑥 → -(𝐹‘𝑤) = -(𝐹‘𝑥))
13	6	sselda 3155	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → 𝑥 ∈ 𝐷)
14		ivth.8	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ)
15	14	renegcld 8336	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → -(𝐹‘𝑥) ∈ ℝ)
16	8, 12, 13, 15	fvmptd3 5609	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑥) = -(𝐹‘𝑥))
17	16, 15	eqeltrd 2254	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑥) ∈ ℝ)
18		fveq2 5515	. . . . . . 7 ⊢ (𝑤 = 𝐴 → (𝐹‘𝑤) = (𝐹‘𝐴))
19	18	negeqd 8151	. . . . . 6 ⊢ (𝑤 = 𝐴 → -(𝐹‘𝑤) = -(𝐹‘𝐴))
20	1	rexrd 8006	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
21	2	rexrd 8006	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
22	1, 2, 5	ltled 8075	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
23		lbicc2 9983	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ≤ 𝐵) → 𝐴 ∈ (𝐴[,]𝐵))
24	20, 21, 22, 23	syl3anc 1238	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ (𝐴[,]𝐵))
25	6, 24	sseldd 3156	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ 𝐷)
26		fveq2 5515	. . . . . . . . 9 ⊢ (𝑥 = 𝐴 → (𝐹‘𝑥) = (𝐹‘𝐴))
27	26	eleq1d 2246	. . . . . . . 8 ⊢ (𝑥 = 𝐴 → ((𝐹‘𝑥) ∈ ℝ ↔ (𝐹‘𝐴) ∈ ℝ))
28	14	ralrimiva 2550	. . . . . . . 8 ⊢ (𝜑 → ∀𝑥 ∈ (𝐴[,]𝐵)(𝐹‘𝑥) ∈ ℝ)
29	27, 28, 24	rspcdva 2846	. . . . . . 7 ⊢ (𝜑 → (𝐹‘𝐴) ∈ ℝ)
30	29	renegcld 8336	. . . . . 6 ⊢ (𝜑 → -(𝐹‘𝐴) ∈ ℝ)
31	8, 19, 25, 30	fvmptd3 5609	. . . . 5 ⊢ (𝜑 → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝐴) = -(𝐹‘𝐴))
32		ivthdec.9	. . . . . . 7 ⊢ (𝜑 → ((𝐹‘𝐵) < 𝑈 ∧ 𝑈 < (𝐹‘𝐴)))
33	32	simprd 114	. . . . . 6 ⊢ (𝜑 → 𝑈 < (𝐹‘𝐴))
34	3, 29	ltnegd 8479	. . . . . 6 ⊢ (𝜑 → (𝑈 < (𝐹‘𝐴) ↔ -(𝐹‘𝐴) < -𝑈))
35	33, 34	mpbid 147	. . . . 5 ⊢ (𝜑 → -(𝐹‘𝐴) < -𝑈)
36	31, 35	eqbrtrd 4025	. . . 4 ⊢ (𝜑 → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝐴) < -𝑈)
37	32	simpld 112	. . . . . 6 ⊢ (𝜑 → (𝐹‘𝐵) < 𝑈)
38		fveq2 5515	. . . . . . . . 9 ⊢ (𝑥 = 𝐵 → (𝐹‘𝑥) = (𝐹‘𝐵))
39	38	eleq1d 2246	. . . . . . . 8 ⊢ (𝑥 = 𝐵 → ((𝐹‘𝑥) ∈ ℝ ↔ (𝐹‘𝐵) ∈ ℝ))
40		ubicc2 9984	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ≤ 𝐵) → 𝐵 ∈ (𝐴[,]𝐵))
41	20, 21, 22, 40	syl3anc 1238	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ (𝐴[,]𝐵))
42	39, 28, 41	rspcdva 2846	. . . . . . 7 ⊢ (𝜑 → (𝐹‘𝐵) ∈ ℝ)
43	42, 3	ltnegd 8479	. . . . . 6 ⊢ (𝜑 → ((𝐹‘𝐵) < 𝑈 ↔ -𝑈 < -(𝐹‘𝐵)))
44	37, 43	mpbid 147	. . . . 5 ⊢ (𝜑 → -𝑈 < -(𝐹‘𝐵))
45		fveq2 5515	. . . . . . 7 ⊢ (𝑤 = 𝐵 → (𝐹‘𝑤) = (𝐹‘𝐵))
46	45	negeqd 8151	. . . . . 6 ⊢ (𝑤 = 𝐵 → -(𝐹‘𝑤) = -(𝐹‘𝐵))
47	6, 41	sseldd 3156	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ 𝐷)
48	42	renegcld 8336	. . . . . 6 ⊢ (𝜑 → -(𝐹‘𝐵) ∈ ℝ)
49	8, 46, 47, 48	fvmptd3 5609	. . . . 5 ⊢ (𝜑 → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝐵) = -(𝐹‘𝐵))
50	44, 49	breqtrrd 4031	. . . 4 ⊢ (𝜑 → -𝑈 < ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝐵))
51	36, 50	jca 306	. . 3 ⊢ (𝜑 → (((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝐴) < -𝑈 ∧ -𝑈 < ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝐵)))
52		ivthdec.i	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → (𝐹‘𝑦) < (𝐹‘𝑥))
53		fveq2 5515	. . . . . . . 8 ⊢ (𝑥 = 𝑦 → (𝐹‘𝑥) = (𝐹‘𝑦))
54	53	eleq1d 2246	. . . . . . 7 ⊢ (𝑥 = 𝑦 → ((𝐹‘𝑥) ∈ ℝ ↔ (𝐹‘𝑦) ∈ ℝ))
55		simpll 527	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → 𝜑)
56	55, 28	syl 14	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → ∀𝑥 ∈ (𝐴[,]𝐵)(𝐹‘𝑥) ∈ ℝ)
57		simprl 529	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → 𝑦 ∈ (𝐴[,]𝐵))
58	54, 56, 57	rspcdva 2846	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → (𝐹‘𝑦) ∈ ℝ)
59	14	adantr 276	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → (𝐹‘𝑥) ∈ ℝ)
60	58, 59	ltnegd 8479	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → ((𝐹‘𝑦) < (𝐹‘𝑥) ↔ -(𝐹‘𝑥) < -(𝐹‘𝑦)))
61	52, 60	mpbid 147	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → -(𝐹‘𝑥) < -(𝐹‘𝑦))
62	13	adantr 276	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → 𝑥 ∈ 𝐷)
63	15	adantr 276	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → -(𝐹‘𝑥) ∈ ℝ)
64	8, 12, 62, 63	fvmptd3 5609	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑥) = -(𝐹‘𝑥))
65		fveq2 5515	. . . . . 6 ⊢ (𝑤 = 𝑦 → (𝐹‘𝑤) = (𝐹‘𝑦))
66	65	negeqd 8151	. . . . 5 ⊢ (𝑤 = 𝑦 → -(𝐹‘𝑤) = -(𝐹‘𝑦))
67	6	sseld 3154	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ (𝐴[,]𝐵) → 𝑦 ∈ 𝐷))
68	55, 57, 67	sylc 62	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → 𝑦 ∈ 𝐷)
69	58	renegcld 8336	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → -(𝐹‘𝑦) ∈ ℝ)
70	8, 66, 68, 69	fvmptd3 5609	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑦) = -(𝐹‘𝑦))
71	61, 64, 70	3brtr4d 4035	. . 3 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑥) < ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑦))
72	1, 2, 4, 5, 6, 10, 17, 51, 71	ivthinc 14091	. 2 ⊢ (𝜑 → ∃𝑐 ∈ (𝐴(,)𝐵)((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑐) = -𝑈)
73		fveq2 5515	. . . . . . 7 ⊢ (𝑤 = 𝑐 → (𝐹‘𝑤) = (𝐹‘𝑐))
74	73	negeqd 8151	. . . . . 6 ⊢ (𝑤 = 𝑐 → -(𝐹‘𝑤) = -(𝐹‘𝑐))
75		ioossicc 9958	. . . . . . . 8 ⊢ (𝐴(,)𝐵) ⊆ (𝐴[,]𝐵)
76	75, 6	sstrid 3166	. . . . . . 7 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
77	76	sselda 3155	. . . . . 6 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → 𝑐 ∈ 𝐷)
78		fveq2 5515	. . . . . . . . 9 ⊢ (𝑥 = 𝑐 → (𝐹‘𝑥) = (𝐹‘𝑐))
79	78	eleq1d 2246	. . . . . . . 8 ⊢ (𝑥 = 𝑐 → ((𝐹‘𝑥) ∈ ℝ ↔ (𝐹‘𝑐) ∈ ℝ))
80	28	adantr 276	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → ∀𝑥 ∈ (𝐴[,]𝐵)(𝐹‘𝑥) ∈ ℝ)
81	75	sseli 3151	. . . . . . . . 9 ⊢ (𝑐 ∈ (𝐴(,)𝐵) → 𝑐 ∈ (𝐴[,]𝐵))
82	81	adantl 277	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → 𝑐 ∈ (𝐴[,]𝐵))
83	79, 80, 82	rspcdva 2846	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → (𝐹‘𝑐) ∈ ℝ)
84	83	renegcld 8336	. . . . . 6 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → -(𝐹‘𝑐) ∈ ℝ)
85	8, 74, 77, 84	fvmptd3 5609	. . . . 5 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → ((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑐) = -(𝐹‘𝑐))
86	85	eqeq1d 2186	. . . 4 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → (((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑐) = -𝑈 ↔ -(𝐹‘𝑐) = -𝑈))
87		cncff 14034	. . . . . . . 8 ⊢ (𝐹 ∈ (𝐷–cn→ℂ) → 𝐹:𝐷⟶ℂ)
88	7, 87	syl 14	. . . . . . 7 ⊢ (𝜑 → 𝐹:𝐷⟶ℂ)
89	88	ffvelcdmda 5651	. . . . . 6 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐷) → (𝐹‘𝑐) ∈ ℂ)
90	77, 89	syldan 282	. . . . 5 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → (𝐹‘𝑐) ∈ ℂ)
91	3	recnd 7985	. . . . . 6 ⊢ (𝜑 → 𝑈 ∈ ℂ)
92	91	adantr 276	. . . . 5 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → 𝑈 ∈ ℂ)
93	90, 92	neg11ad 8263	. . . 4 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → (-(𝐹‘𝑐) = -𝑈 ↔ (𝐹‘𝑐) = 𝑈))
94	86, 93	bitrd 188	. . 3 ⊢ ((𝜑 ∧ 𝑐 ∈ (𝐴(,)𝐵)) → (((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑐) = -𝑈 ↔ (𝐹‘𝑐) = 𝑈))
95	94	rexbidva 2474	. 2 ⊢ (𝜑 → (∃𝑐 ∈ (𝐴(,)𝐵)((𝑤 ∈ 𝐷 ↦ -(𝐹‘𝑤))‘𝑐) = -𝑈 ↔ ∃𝑐 ∈ (𝐴(,)𝐵)(𝐹‘𝑐) = 𝑈))
96	72, 95	mpbid 147	1 ⊢ (𝜑 → ∃𝑐 ∈ (𝐴(,)𝐵)(𝐹‘𝑐) = 𝑈)

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 = wceq 1353 ∈ wcel 2148 ∀wral 2455 ∃wrex 2456 ⊆ wss 3129 class class class wbr 4003 ↦ cmpt 4064 ⟶wf 5212 ‘cfv 5216 (class class class)co 5874 ℂcc 7808 ℝcr 7809 ℝ^*cxr 7990 < clt 7991 ≤ cle 7992 -cneg 8128 (,)cioo 9887 [,]cicc 9890 –cn→ccncf 14027

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4118 ax-sep 4121 ax-nul 4129 ax-pow 4174 ax-pr 4209 ax-un 4433 ax-setind 4536 ax-iinf 4587 ax-cnex 7901 ax-resscn 7902 ax-1cn 7903 ax-1re 7904 ax-icn 7905 ax-addcl 7906 ax-addrcl 7907 ax-mulcl 7908 ax-mulrcl 7909 ax-addcom 7910 ax-mulcom 7911 ax-addass 7912 ax-mulass 7913 ax-distr 7914 ax-i2m1 7915 ax-0lt1 7916 ax-1rid 7917 ax-0id 7918 ax-rnegex 7919 ax-precex 7920 ax-cnre 7921 ax-pre-ltirr 7922 ax-pre-ltwlin 7923 ax-pre-lttrn 7924 ax-pre-apti 7925 ax-pre-ltadd 7926 ax-pre-mulgt0 7927 ax-pre-mulext 7928 ax-arch 7929 ax-caucvg 7930 ax-pre-suploc 7931

This theorem depends on definitions: df-bi 117 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2739 df-sbc 2963 df-csb 3058 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-nul 3423 df-if 3535 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-int 3845 df-iun 3888 df-br 4004 df-opab 4065 df-mpt 4066 df-tr 4102 df-id 4293 df-po 4296 df-iso 4297 df-iord 4366 df-on 4368 df-ilim 4369 df-suc 4371 df-iom 4590 df-xp 4632 df-rel 4633 df-cnv 4634 df-co 4635 df-dm 4636 df-rn 4637 df-res 4638 df-ima 4639 df-iota 5178 df-fun 5218 df-fn 5219 df-f 5220 df-f1 5221 df-fo 5222 df-f1o 5223 df-fv 5224 df-isom 5225 df-riota 5830 df-ov 5877 df-oprab 5878 df-mpo 5879 df-1st 6140 df-2nd 6141 df-recs 6305 df-frec 6391 df-map 6649 df-sup 6982 df-inf 6983 df-pnf 7993 df-mnf 7994 df-xr 7995 df-ltxr 7996 df-le 7997 df-sub 8129 df-neg 8130 df-reap 8531 df-ap 8538 df-div 8629 df-inn 8919 df-2 8977 df-3 8978 df-4 8979 df-n0 9176 df-z 9253 df-uz 9528 df-rp 9653 df-ioo 9891 df-icc 9894 df-seqfrec 10445 df-exp 10519 df-cj 10850 df-re 10851 df-im 10852 df-rsqrt 11006 df-abs 11007 df-cncf 14028

This theorem is referenced by: cosz12 14171 ioocosf1o 14245

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