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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 511 | . 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 13387 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))) | |
| 8 | 4, 5, 6, 7 | syl3anc 1373 | . 2 ⊢ (𝜑 → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵))) |
| 9 | 3, 8 | mpbird 257 | 1 ⊢ (𝜑 → 𝐶 ∈ (𝐴[,]𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2109 class class class wbr 5115 (class class class)co 7394 ℝ*cxr 11225 ≤ cle 11227 [,]cicc 13322 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5259 ax-nul 5269 ax-pr 5395 ax-un 7718 ax-cnex 11142 ax-resscn 11143 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2880 df-ral 3047 df-rex 3056 df-rab 3412 df-v 3457 df-sbc 3762 df-dif 3925 df-un 3927 df-in 3929 df-ss 3939 df-nul 4305 df-if 4497 df-pw 4573 df-sn 4598 df-pr 4600 df-op 4604 df-uni 4880 df-br 5116 df-opab 5178 df-id 5541 df-xp 5652 df-rel 5653 df-cnv 5654 df-co 5655 df-dm 5656 df-iota 6472 df-fun 6521 df-fv 6527 df-ov 7397 df-oprab 7398 df-mpo 7399 df-xr 11230 df-icc 13326 |
| This theorem is referenced by: inficc 45505 iccdificc 45510 sge0cl 46352 sge0p1 46385 sge0rpcpnf 46392 ovnsubaddlem1 46541 ovolval5lem1 46623 |
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