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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 11266 | . . . 4 ⊢ 0 ∈ ℝ | |
2 | leloe 11350 | . . . 4 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴))) | |
3 | 1, 2 | mpan 688 | . . 3 ⊢ (𝐴 ∈ ℝ → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴))) |
4 | breq2 5157 | . . . . . . 7 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
5 | breq2 5157 | . . . . . . 7 ⊢ (𝑥 = 𝐴 → (𝐴 < 𝑥 ↔ 𝐴 < 𝐴)) | |
6 | 4, 5 | imbi12d 343 | . . . . . 6 ⊢ (𝑥 = 𝐴 → ((0 < 𝑥 → 𝐴 < 𝑥) ↔ (0 < 𝐴 → 𝐴 < 𝐴))) |
7 | 6 | rspcv 3604 | . . . . 5 ⊢ (𝐴 ∈ ℝ → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → (0 < 𝐴 → 𝐴 < 𝐴))) |
8 | ltnr 11359 | . . . . . . . . 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 2734 | . . . . 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 857 | . . 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 1108 | 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 845 ∧ w3a 1084 = wceq 1534 ∈ wcel 2099 ∀wral 3051 class class class wbr 5153 ℝcr 11157 0cc0 11158 < clt 11298 ≤ cle 11299 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2697 ax-sep 5304 ax-nul 5311 ax-pow 5369 ax-pr 5433 ax-un 7746 ax-resscn 11215 ax-1cn 11216 ax-addrcl 11219 ax-rnegex 11229 ax-cnre 11231 ax-pre-lttri 11232 ax-pre-lttrn 11233 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2704 df-cleq 2718 df-clel 2803 df-nfc 2878 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rab 3420 df-v 3464 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-nul 4326 df-if 4534 df-pw 4609 df-sn 4634 df-pr 4636 df-op 4640 df-uni 4914 df-br 5154 df-opab 5216 df-mpt 5237 df-id 5580 df-po 5594 df-so 5595 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-iota 6506 df-fun 6556 df-fn 6557 df-f 6558 df-f1 6559 df-fo 6560 df-f1o 6561 df-fv 6562 df-er 8734 df-en 8975 df-dom 8976 df-sdom 8977 df-pnf 11300 df-mnf 11301 df-xr 11302 df-ltxr 11303 df-le 11304 |
This theorem is referenced by: (None) |
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