| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > xreqnltd | Structured version Visualization version GIF version | ||
| Description: A consequence of trichotomy. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
| Ref | Expression |
|---|---|
| xreqnltd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| xreqnltd.2 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| xreqnltd | ⊢ (𝜑 → ¬ 𝐴 < 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xreqnltd.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | xreqnltd.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 3 | 1, 2 | eqeltrrd 2829 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| 4 | xrlttri3 13033 | . . . 4 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 = 𝐵 ↔ (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴))) | |
| 5 | 2, 3, 4 | syl2anc 584 | . . 3 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴))) |
| 6 | 1, 5 | mpbid 232 | . 2 ⊢ (𝜑 → (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴)) |
| 7 | 6 | simpld 494 | 1 ⊢ (𝜑 → ¬ 𝐴 < 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 class class class wbr 5088 ℝ*cxr 11136 < clt 11137 |
| 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 2701 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5367 ax-un 7662 ax-cnex 11053 ax-resscn 11054 ax-pre-lttri 11071 ax-pre-lttrn 11072 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rab 3393 df-v 3435 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-br 5089 df-opab 5151 df-mpt 5170 df-id 5508 df-po 5521 df-so 5522 df-xp 5619 df-rel 5620 df-cnv 5621 df-co 5622 df-dm 5623 df-rn 5624 df-res 5625 df-ima 5626 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-er 8616 df-en 8864 df-dom 8865 df-sdom 8866 df-pnf 11139 df-mnf 11140 df-xr 11141 df-ltxr 11142 |
| This theorem is referenced by: limsuppnflem 45705 |
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