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Mirrors > Home > MPE Home > Th. List > modirr | Structured version Visualization version GIF version |
Description: A number modulo an irrational multiple of it is nonzero. (Contributed by NM, 11-Nov-2008.) |
Ref | Expression |
---|---|
modirr | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+ ∧ (𝐴 / 𝐵) ∈ (ℝ ∖ ℚ)) → (𝐴 mod 𝐵) ≠ 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3550 | . . 3 ⊢ ((𝐴 / 𝐵) ∈ (ℝ ∖ ℚ) ↔ ((𝐴 / 𝐵) ∈ ℝ ∧ ¬ (𝐴 / 𝐵) ∈ ℚ)) | |
2 | modval 12532 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐴 mod 𝐵) = (𝐴 − (𝐵 · (⌊‘(𝐴 / 𝐵))))) | |
3 | 2 | eqeq1d 2612 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → ((𝐴 mod 𝐵) = 0 ↔ (𝐴 − (𝐵 · (⌊‘(𝐴 / 𝐵)))) = 0)) |
4 | recn 9905 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
5 | 4 | adantr 480 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → 𝐴 ∈ ℂ) |
6 | rpre 11715 | . . . . . . . . . . 11 ⊢ (𝐵 ∈ ℝ+ → 𝐵 ∈ ℝ) | |
7 | 6 | adantl 481 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → 𝐵 ∈ ℝ) |
8 | refldivcl 12486 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (⌊‘(𝐴 / 𝐵)) ∈ ℝ) | |
9 | 7, 8 | remulcld 9949 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐵 · (⌊‘(𝐴 / 𝐵))) ∈ ℝ) |
10 | 9 | recnd 9947 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐵 · (⌊‘(𝐴 / 𝐵))) ∈ ℂ) |
11 | 5, 10 | subeq0ad 10281 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → ((𝐴 − (𝐵 · (⌊‘(𝐴 / 𝐵)))) = 0 ↔ 𝐴 = (𝐵 · (⌊‘(𝐴 / 𝐵))))) |
12 | eqcom 2617 | . . . . . . . 8 ⊢ ((𝐴 / 𝐵) = (⌊‘(𝐴 / 𝐵)) ↔ (⌊‘(𝐴 / 𝐵)) = (𝐴 / 𝐵)) | |
13 | rerpdivcl 11737 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐴 / 𝐵) ∈ ℝ) | |
14 | reflcl 12459 | . . . . . . . . . . 11 ⊢ ((𝐴 / 𝐵) ∈ ℝ → (⌊‘(𝐴 / 𝐵)) ∈ ℝ) | |
15 | 14 | recnd 9947 | . . . . . . . . . 10 ⊢ ((𝐴 / 𝐵) ∈ ℝ → (⌊‘(𝐴 / 𝐵)) ∈ ℂ) |
16 | 13, 15 | syl 17 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (⌊‘(𝐴 / 𝐵)) ∈ ℂ) |
17 | rpcnne0 11726 | . . . . . . . . . 10 ⊢ (𝐵 ∈ ℝ+ → (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) | |
18 | 17 | adantl 481 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) |
19 | divmul2 10568 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (⌊‘(𝐴 / 𝐵)) ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) → ((𝐴 / 𝐵) = (⌊‘(𝐴 / 𝐵)) ↔ 𝐴 = (𝐵 · (⌊‘(𝐴 / 𝐵))))) | |
20 | 5, 16, 18, 19 | syl3anc 1318 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → ((𝐴 / 𝐵) = (⌊‘(𝐴 / 𝐵)) ↔ 𝐴 = (𝐵 · (⌊‘(𝐴 / 𝐵))))) |
21 | 12, 20 | syl5rbbr 274 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐴 = (𝐵 · (⌊‘(𝐴 / 𝐵))) ↔ (⌊‘(𝐴 / 𝐵)) = (𝐴 / 𝐵))) |
22 | 3, 11, 21 | 3bitrd 293 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → ((𝐴 mod 𝐵) = 0 ↔ (⌊‘(𝐴 / 𝐵)) = (𝐴 / 𝐵))) |
23 | flidz 12473 | . . . . . . . 8 ⊢ ((𝐴 / 𝐵) ∈ ℝ → ((⌊‘(𝐴 / 𝐵)) = (𝐴 / 𝐵) ↔ (𝐴 / 𝐵) ∈ ℤ)) | |
24 | zq 11670 | . . . . . . . 8 ⊢ ((𝐴 / 𝐵) ∈ ℤ → (𝐴 / 𝐵) ∈ ℚ) | |
25 | 23, 24 | syl6bi 242 | . . . . . . 7 ⊢ ((𝐴 / 𝐵) ∈ ℝ → ((⌊‘(𝐴 / 𝐵)) = (𝐴 / 𝐵) → (𝐴 / 𝐵) ∈ ℚ)) |
26 | 13, 25 | syl 17 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → ((⌊‘(𝐴 / 𝐵)) = (𝐴 / 𝐵) → (𝐴 / 𝐵) ∈ ℚ)) |
27 | 22, 26 | sylbid 229 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → ((𝐴 mod 𝐵) = 0 → (𝐴 / 𝐵) ∈ ℚ)) |
28 | 27 | necon3bd 2796 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (¬ (𝐴 / 𝐵) ∈ ℚ → (𝐴 mod 𝐵) ≠ 0)) |
29 | 28 | adantld 482 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (((𝐴 / 𝐵) ∈ ℝ ∧ ¬ (𝐴 / 𝐵) ∈ ℚ) → (𝐴 mod 𝐵) ≠ 0)) |
30 | 1, 29 | syl5bi 231 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → ((𝐴 / 𝐵) ∈ (ℝ ∖ ℚ) → (𝐴 mod 𝐵) ≠ 0)) |
31 | 30 | 3impia 1253 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+ ∧ (𝐴 / 𝐵) ∈ (ℝ ∖ ℚ)) → (𝐴 mod 𝐵) ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 ∖ cdif 3537 ‘cfv 5804 (class class class)co 6549 ℂcc 9813 ℝcr 9814 0cc0 9815 · cmul 9820 − cmin 10145 / cdiv 10563 ℤcz 11254 ℚcq 11664 ℝ+crp 11708 ⌊cfl 12453 mod cmo 12530 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-sup 8231 df-inf 8232 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-n0 11170 df-z 11255 df-uz 11564 df-q 11665 df-rp 11709 df-fl 12455 df-mod 12531 |
This theorem is referenced by: (None) |
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