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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 521 | . 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 13554 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))) | |
| 8 | 4, 5, 6, 7 | syl3anc 1398 | . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2146 class class class wbr 5105 (class class class)co 7427 ℝ*cxr 11352 ≤ cle 11354 [,]cicc 13489 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5251 ax-pr 5394 ax-un 7758 ax-cnex 11266 ax-resscn 11267 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ral 3080 df-rex 3090 df-rab 3416 df-v 3455 df-sbc 3742 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-pw 4561 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-br 5106 df-opab 5170 df-id 5549 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-iota 6500 df-fun 6548 df-fv 6554 df-ov 7430 df-oprab 7431 df-mpo 7432 df-xr 11357 df-icc 13493 |
| This theorem is used by: inficc 46685 iccdificc 46690 sge0cl 47530 sge0p1 47563 sge0rpcpnf 47570 ovnsubaddlem1 47719 ovolval5lem1 47801 |
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