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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 13467 | . . 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 2145 class class class wbr 5103 (class class class)co 7414 ℝ*cxr 11267 ≤ cle 11269 [,]cicc 13402 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-resscn 11182 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3740 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6489 df-fun 6535 df-fv 6541 df-ov 7417 df-oprab 7418 df-mpo 7419 df-xr 11272 df-icc 13406 |
| This theorem is used by: inficc 46365 iccdificc 46370 sge0cl 47210 sge0p1 47243 sge0rpcpnf 47250 ovnsubaddlem1 47399 ovolval5lem1 47481 |
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