iooneg - Metamath Proof Explorer

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Theorem iooneg 13472

Description: Membership in a negated open real interval. (Contributed by Paul Chapman, 26-Nov-2007.)

**Assertion**
Ref	Expression
iooneg	⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 ∈ (𝐴(,)𝐵) ↔ -𝐶 ∈ (-𝐵(,)-𝐴)))

**Proof of Theorem iooneg**
Step	Hyp	Ref	Expression
1		ltneg 11684	. . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐴 < 𝐶 ↔ -𝐶 < -𝐴))
2	1	3adant2 1143	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐴 < 𝐶 ↔ -𝐶 < -𝐴))
3		ltneg 11684	. . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐶 < 𝐵 ↔ -𝐵 < -𝐶))
4	3	ancoms 462	. . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 < 𝐵 ↔ -𝐵 < -𝐶))
5	4	3adant1 1142	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 < 𝐵 ↔ -𝐵 < -𝐶))
6	2, 5	anbi12d 641	. . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 < 𝐶 ∧ 𝐶 < 𝐵) ↔ (-𝐶 < -𝐴 ∧ -𝐵 < -𝐶)))
7	6	biancomd 467	. 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 < 𝐶 ∧ 𝐶 < 𝐵) ↔ (-𝐵 < -𝐶 ∧ -𝐶 < -𝐴)))
8		rexr 11225	. . 3 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ^*)
9		rexr 11225	. . 3 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℝ^*)
10		rexr 11225	. . 3 ⊢ (𝐶 ∈ ℝ → 𝐶 ∈ ℝ^*)
11		elioo5 13404	. . 3 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^*) → (𝐶 ∈ (𝐴(,)𝐵) ↔ (𝐴 < 𝐶 ∧ 𝐶 < 𝐵)))
12	8, 9, 10, 11	syl3an 1172	. 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 ∈ (𝐴(,)𝐵) ↔ (𝐴 < 𝐶 ∧ 𝐶 < 𝐵)))
13		renegcl 11491	. . . 4 ⊢ (𝐵 ∈ ℝ → -𝐵 ∈ ℝ)
14		renegcl 11491	. . . 4 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ)
15		renegcl 11491	. . . 4 ⊢ (𝐶 ∈ ℝ → -𝐶 ∈ ℝ)
16		rexr 11225	. . . . 5 ⊢ (-𝐵 ∈ ℝ → -𝐵 ∈ ℝ^*)
17		rexr 11225	. . . . 5 ⊢ (-𝐴 ∈ ℝ → -𝐴 ∈ ℝ^*)
18		rexr 11225	. . . . 5 ⊢ (-𝐶 ∈ ℝ → -𝐶 ∈ ℝ^*)
19		elioo5 13404	. . . . 5 ⊢ ((-𝐵 ∈ ℝ^* ∧ -𝐴 ∈ ℝ^* ∧ -𝐶 ∈ ℝ^*) → (-𝐶 ∈ (-𝐵(,)-𝐴) ↔ (-𝐵 < -𝐶 ∧ -𝐶 < -𝐴)))
20	16, 17, 18, 19	syl3an 1172	. . . 4 ⊢ ((-𝐵 ∈ ℝ ∧ -𝐴 ∈ ℝ ∧ -𝐶 ∈ ℝ) → (-𝐶 ∈ (-𝐵(,)-𝐴) ↔ (-𝐵 < -𝐶 ∧ -𝐶 < -𝐴)))
21	13, 14, 15, 20	syl3an 1172	. . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (-𝐶 ∈ (-𝐵(,)-𝐴) ↔ (-𝐵 < -𝐶 ∧ -𝐶 < -𝐴)))
22	21	3com12 1135	. 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (-𝐶 ∈ (-𝐵(,)-𝐴) ↔ (-𝐵 < -𝐶 ∧ -𝐶 < -𝐴)))
23	7, 12, 22	3bitr4d 313	1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 ∈ (𝐴(,)𝐵) ↔ -𝐶 ∈ (-𝐵(,)-𝐴)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 ∧ w3a 1097 ∈ wcel 2141 class class class wbr 5099 (class class class)co 7392 ℝcr 11069 ℝ^*cxr 11212 < clt 11213 -cneg 11412 (,)cioo 13346

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 ax-cnex 11126 ax-resscn 11127 ax-1cn 11128 ax-icn 11129 ax-addcl 11130 ax-addrcl 11131 ax-mulcl 11132 ax-mulrcl 11133 ax-mulcom 11134 ax-addass 11135 ax-mulass 11136 ax-distr 11137 ax-i2m1 11138 ax-1ne0 11139 ax-1rid 11140 ax-rnegex 11141 ax-rrecex 11142 ax-cnre 11143 ax-pre-lttri 11144 ax-pre-lttrn 11145 ax-pre-ltadd 11146

This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5540 df-po 5553 df-so 5554 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-riota 7349 df-ov 7395 df-oprab 7396 df-mpo 7397 df-er 8673 df-en 8924 df-dom 8925 df-sdom 8926 df-pnf 11215 df-mnf 11216 df-xr 11217 df-ltxr 11218 df-le 11219 df-sub 11413 df-neg 11414 df-ioo 13350

This theorem is referenced by: lhop2 26057 asinsin 26934 atanlogsub 26958 atanbnd 26968

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