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Mirrors > Home > MPE Home > Th. List > squeeze0 | Structured version Visualization version GIF version |
Description: If a nonnegative number is less than any positive number, it is zero. (Contributed by NM, 11-Feb-2006.) |
Ref | Expression |
---|---|
squeeze0 | ⊢ ((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ ∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥)) → 𝐴 = 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0re 11165 | . . . 4 ⊢ 0 ∈ ℝ | |
2 | leloe 11249 | . . . 4 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴))) | |
3 | 1, 2 | mpan 689 | . . 3 ⊢ (𝐴 ∈ ℝ → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴))) |
4 | breq2 5113 | . . . . . . 7 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
5 | breq2 5113 | . . . . . . 7 ⊢ (𝑥 = 𝐴 → (𝐴 < 𝑥 ↔ 𝐴 < 𝐴)) | |
6 | 4, 5 | imbi12d 345 | . . . . . 6 ⊢ (𝑥 = 𝐴 → ((0 < 𝑥 → 𝐴 < 𝑥) ↔ (0 < 𝐴 → 𝐴 < 𝐴))) |
7 | 6 | rspcv 3579 | . . . . 5 ⊢ (𝐴 ∈ ℝ → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → (0 < 𝐴 → 𝐴 < 𝐴))) |
8 | ltnr 11258 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℝ → ¬ 𝐴 < 𝐴) | |
9 | 8 | pm2.21d 121 | . . . . . . . 8 ⊢ (𝐴 ∈ ℝ → (𝐴 < 𝐴 → 𝐴 = 0)) |
10 | 9 | com12 32 | . . . . . . 7 ⊢ (𝐴 < 𝐴 → (𝐴 ∈ ℝ → 𝐴 = 0)) |
11 | 10 | imim2i 16 | . . . . . 6 ⊢ ((0 < 𝐴 → 𝐴 < 𝐴) → (0 < 𝐴 → (𝐴 ∈ ℝ → 𝐴 = 0))) |
12 | 11 | com13 88 | . . . . 5 ⊢ (𝐴 ∈ ℝ → (0 < 𝐴 → ((0 < 𝐴 → 𝐴 < 𝐴) → 𝐴 = 0))) |
13 | 7, 12 | syl5d 73 | . . . 4 ⊢ (𝐴 ∈ ℝ → (0 < 𝐴 → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → 𝐴 = 0))) |
14 | ax-1 6 | . . . . . 6 ⊢ (𝐴 = 0 → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → 𝐴 = 0)) | |
15 | 14 | eqcoms 2741 | . . . . 5 ⊢ (0 = 𝐴 → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → 𝐴 = 0)) |
16 | 15 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ ℝ → (0 = 𝐴 → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → 𝐴 = 0))) |
17 | 13, 16 | jaod 858 | . . 3 ⊢ (𝐴 ∈ ℝ → ((0 < 𝐴 ∨ 0 = 𝐴) → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → 𝐴 = 0))) |
18 | 3, 17 | sylbid 239 | . 2 ⊢ (𝐴 ∈ ℝ → (0 ≤ 𝐴 → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → 𝐴 = 0))) |
19 | 18 | 3imp 1112 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ∧ ∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥)) → 𝐴 = 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ∀wral 3061 class class class wbr 5109 ℝcr 11058 0cc0 11059 < clt 11197 ≤ cle 11198 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5260 ax-nul 5267 ax-pow 5324 ax-pr 5388 ax-un 7676 ax-resscn 11116 ax-1cn 11117 ax-addrcl 11120 ax-rnegex 11130 ax-cnre 11132 ax-pre-lttri 11133 ax-pre-lttrn 11134 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rab 3407 df-v 3449 df-sbc 3744 df-csb 3860 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4287 df-if 4491 df-pw 4566 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4870 df-br 5110 df-opab 5172 df-mpt 5193 df-id 5535 df-po 5549 df-so 5550 df-xp 5643 df-rel 5644 df-cnv 5645 df-co 5646 df-dm 5647 df-rn 5648 df-res 5649 df-ima 5650 df-iota 6452 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-er 8654 df-en 8890 df-dom 8891 df-sdom 8892 df-pnf 11199 df-mnf 11200 df-xr 11201 df-ltxr 11202 df-le 11203 |
This theorem is referenced by: (None) |
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