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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 10966 | . . . 4 ⊢ 0 ∈ ℝ | |
2 | leloe 11050 | . . . 4 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴))) | |
3 | 1, 2 | mpan 687 | . . 3 ⊢ (𝐴 ∈ ℝ → (0 ≤ 𝐴 ↔ (0 < 𝐴 ∨ 0 = 𝐴))) |
4 | breq2 5079 | . . . . . . 7 ⊢ (𝑥 = 𝐴 → (0 < 𝑥 ↔ 0 < 𝐴)) | |
5 | breq2 5079 | . . . . . . 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 3556 | . . . . 5 ⊢ (𝐴 ∈ ℝ → (∀𝑥 ∈ ℝ (0 < 𝑥 → 𝐴 < 𝑥) → (0 < 𝐴 → 𝐴 < 𝐴))) |
8 | ltnr 11059 | . . . . . . . . 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 2746 | . . . . 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 856 | . . 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 1110 | 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 844 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∀wral 3064 class class class wbr 5075 ℝcr 10859 0cc0 10860 < clt 10998 ≤ cle 10999 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7580 ax-resscn 10917 ax-1cn 10918 ax-addrcl 10921 ax-rnegex 10931 ax-cnre 10933 ax-pre-lttri 10934 ax-pre-lttrn 10935 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-nel 3050 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3433 df-sbc 3718 df-csb 3834 df-dif 3891 df-un 3893 df-in 3895 df-ss 3905 df-nul 4259 df-if 4462 df-pw 4537 df-sn 4564 df-pr 4566 df-op 4570 df-uni 4842 df-br 5076 df-opab 5138 df-mpt 5159 df-id 5486 df-po 5500 df-so 5501 df-xp 5592 df-rel 5593 df-cnv 5594 df-co 5595 df-dm 5596 df-rn 5597 df-res 5598 df-ima 5599 df-iota 6386 df-fun 6430 df-fn 6431 df-f 6432 df-f1 6433 df-fo 6434 df-f1o 6435 df-fv 6436 df-er 8487 df-en 8723 df-dom 8724 df-sdom 8725 df-pnf 11000 df-mnf 11001 df-xr 11002 df-ltxr 11003 df-le 11004 |
This theorem is referenced by: (None) |
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