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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 0nonelalab | Structured version Visualization version GIF version | ||
| Description: Technical lemma for open interval. (Contributed by metakunt, 12-Aug-2024.) |
| Ref | Expression |
|---|---|
| 0nonelaleb.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| 0nonelaleb.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 0nonelaleb.3 | ⊢ (𝜑 → 0 < 𝐴) |
| 0nonelaleb.4 | ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| 0nonelalab.5 | ⊢ (𝜑 → 𝐶 ∈ (𝐴(,)𝐵)) |
| Ref | Expression |
|---|---|
| 0nonelalab | ⊢ (𝜑 → 0 ≠ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0red 11311 | . 2 ⊢ (𝜑 → 0 ∈ ℝ) | |
| 2 | 0nonelaleb.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 3 | 0nonelalab.5 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ (𝐴(,)𝐵)) | |
| 4 | elioore 13506 | . . . 4 ⊢ (𝐶 ∈ (𝐴(,)𝐵) → 𝐶 ∈ ℝ) | |
| 5 | 3, 4 | syl 18 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| 6 | 0nonelaleb.3 | . . 3 ⊢ (𝜑 → 0 < 𝐴) | |
| 7 | 2 | rexrd 11359 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| 8 | 0nonelaleb.2 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 9 | 8 | rexrd 11359 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| 10 | elioo2 13517 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴(,)𝐵) ↔ (𝐶 ∈ ℝ ∧ 𝐴 < 𝐶 ∧ 𝐶 < 𝐵))) | |
| 11 | 7, 9, 10 | syl2anc 596 | . . . . 5 ⊢ (𝜑 → (𝐶 ∈ (𝐴(,)𝐵) ↔ (𝐶 ∈ ℝ ∧ 𝐴 < 𝐶 ∧ 𝐶 < 𝐵))) |
| 12 | 3, 11 | mpbid 235 | . . . 4 ⊢ (𝜑 → (𝐶 ∈ ℝ ∧ 𝐴 < 𝐶 ∧ 𝐶 < 𝐵)) |
| 13 | 12 | simp2d 1161 | . . 3 ⊢ (𝜑 → 𝐴 < 𝐶) |
| 14 | 1, 2, 5, 6, 13 | lttrd 11471 | . 2 ⊢ (𝜑 → 0 < 𝐶) |
| 15 | 1, 14 | ltned 11446 | 1 ⊢ (𝜑 → 0 ≠ 𝐶) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ w3a 1103 ∈ wcel 2145 ≠ wne 2956 class class class wbr 5103 (class class class)co 7420 ℝcr 11199 0cc0 11200 ℝ*cxr 11342 < clt 11343 ≤ cle 11344 (,)cioo 13476 |
| 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 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-addrcl 11261 ax-rnegex 11271 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 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-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-ioo 13480 |
| This theorem is used by: dvrelogpow2b 43118 |
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