| Mathbox for Glauco Siliprandi |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > xrleneltd | Structured version Visualization version GIF version | ||
| Description: 'Less than or equal to' and 'not equals' implies 'less than', for extended reals. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| xrleneltd.a | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| xrleneltd.b | ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| xrleneltd.alb | ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| xrleneltd.anb | ⊢ (𝜑 → 𝐴 ≠ 𝐵) |
| Ref | Expression |
|---|---|
| xrleneltd | ⊢ (𝜑 → 𝐴 < 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrleneltd.anb | . . 3 ⊢ (𝜑 → 𝐴 ≠ 𝐵) | |
| 2 | 1 | necomd 2988 | . 2 ⊢ (𝜑 → 𝐵 ≠ 𝐴) |
| 3 | xrleneltd.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 4 | xrleneltd.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ*) | |
| 5 | xrleneltd.alb | . . 3 ⊢ (𝜑 → 𝐴 ≤ 𝐵) | |
| 6 | xrleltne 13090 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → (𝐴 < 𝐵 ↔ 𝐵 ≠ 𝐴)) | |
| 7 | 3, 4, 5, 6 | syl3anc 1374 | . 2 ⊢ (𝜑 → (𝐴 < 𝐵 ↔ 𝐵 ≠ 𝐴)) |
| 8 | 2, 7 | mpbird 257 | 1 ⊢ (𝜑 → 𝐴 < 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∈ wcel 2114 ≠ wne 2933 class class class wbr 5086 ℝ*cxr 11172 < clt 11173 ≤ cle 11174 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-pre-lttri 11106 ax-pre-lttrn 11107 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5520 df-po 5533 df-so 5534 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 |
| This theorem is referenced by: infleinf 45822 pimxrneun 45937 eliccelicod 45981 ge0xrre 45982 ressioosup 46006 ressiooinf 46008 sge0pr 46843 |
| Copyright terms: Public domain | W3C validator |