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| Mirrors > Home > MPE Home > Th. List > Mathboxes > relt0neg2 | Structured version Visualization version GIF version | ||
| Description: Comparison of a real and its negative to zero. Compare lt0neg2 11705. (Contributed by SN, 13-Feb-2024.) |
| Ref | Expression |
|---|---|
| relt0neg2 | ⊢ (𝐴 ∈ ℝ → (0 < 𝐴 ↔ (0 −ℝ 𝐴) < 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elre0re 42875 | . . 3 ⊢ (𝐴 ∈ ℝ → 0 ∈ ℝ) | |
| 2 | id 22 | . . 3 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ) | |
| 3 | reltsub1 43000 | . . 3 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 < 𝐴 ↔ (0 −ℝ 𝐴) < (𝐴 −ℝ 𝐴))) | |
| 4 | 1, 2, 2, 3 | syl3anc 1392 | . 2 ⊢ (𝐴 ∈ ℝ → (0 < 𝐴 ↔ (0 −ℝ 𝐴) < (𝐴 −ℝ 𝐴))) |
| 5 | resubid 43023 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 −ℝ 𝐴) = 0) | |
| 6 | 5 | breq2d 5113 | . 2 ⊢ (𝐴 ∈ ℝ → ((0 −ℝ 𝐴) < (𝐴 −ℝ 𝐴) ↔ (0 −ℝ 𝐴) < 0)) |
| 7 | 4, 6 | bitrd 281 | 1 ⊢ (𝐴 ∈ ℝ → (0 < 𝐴 ↔ (0 −ℝ 𝐴) < 0)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∈ wcel 2143 class class class wbr 5101 (class class class)co 7396 ℝcr 11083 0cc0 11084 < clt 11227 −ℝ cresub 42979 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7718 ax-resscn 11141 ax-1cn 11142 ax-icn 11143 ax-addcl 11144 ax-addrcl 11145 ax-mulcl 11146 ax-mulrcl 11147 ax-addass 11149 ax-mulass 11150 ax-distr 11151 ax-i2m1 11152 ax-1ne0 11153 ax-1rid 11154 ax-rnegex 11155 ax-rrecex 11156 ax-cnre 11157 ax-pre-lttri 11158 ax-pre-lttrn 11159 ax-pre-ltadd 11160 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5102 df-opab 5164 df-mpt 5183 df-id 5543 df-po 5556 df-so 5557 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-pnf 11229 df-mnf 11230 df-ltxr 11232 df-2 12290 df-3 12291 df-resub 42980 |
| This theorem is referenced by: mulgt0b1d 43099 reneg1lt0 43107 mullt0b1d 43110 |
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