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| Mirrors > Home > MPE Home > Th. List > Mathboxes > eliccxrd | Structured version Visualization version GIF version | ||
| Description: Membership in a closed real interval. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| eliccxrd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| eliccxrd.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| eliccxrd.3 | ⊢ (𝜑 → 𝐶 ∈ ℝ*) |
| eliccxrd.4 | ⊢ (𝜑 → 𝐴 ≤ 𝐶) |
| eliccxrd.5 | ⊢ (𝜑 → 𝐶 ≤ 𝐵) |
| Ref | Expression |
|---|---|
| eliccxrd | ⊢ (𝜑 → 𝐶 ∈ (𝐴[,]𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eliccxrd.4 | . . 3 ⊢ (𝜑 → 𝐴 ≤ 𝐶) | |
| 2 | eliccxrd.5 | . . 3 ⊢ (𝜑 → 𝐶 ≤ 𝐵) | |
| 3 | 1, 2 | jca 520 | . 2 ⊢ (𝜑 → (𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)) |
| 4 | eliccxrd.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 5 | eliccxrd.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ*) | |
| 6 | eliccxrd.3 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ*) | |
| 7 | elicc4 13440 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))) | |
| 8 | 4, 5, 6, 7 | syl3anc 1396 | . 2 ⊢ (𝜑 → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))) |
| 9 | 3, 8 | mpbird 260 | 1 ⊢ (𝜑 → 𝐶 ∈ (𝐴[,]𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∈ wcel 2149 class class class wbr 5113 (class class class)co 7411 ℝ*cxr 11242 ≤ cle 11244 [,]cicc 13375 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-pr 5405 ax-un 7733 ax-cnex 11156 ax-resscn 11157 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-sbc 3754 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-iota 6493 df-fun 6539 df-fv 6545 df-ov 7414 df-oprab 7415 df-mpo 7416 df-xr 11247 df-icc 13379 |
| This theorem is referenced by: inficc 46142 iccdificc 46147 sge0cl 46987 sge0p1 47020 sge0rpcpnf 47027 ovnsubaddlem1 47176 ovolval5lem1 47258 |
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