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Mirrors > Home > MPE Home > Th. List > Mathboxes > dirkerdenne0 | Structured version Visualization version GIF version |
Description: The Dirichlet Kernel denominator is never 0. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
Ref | Expression |
---|---|
dirkerdenne0 | ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ((2 · π) · (sin‘(𝑆 / 2))) ≠ 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2cnd 12049 | . . 3 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → 2 ∈ ℂ) | |
2 | picn 25612 | . . . 4 ⊢ π ∈ ℂ | |
3 | 2 | a1i 11 | . . 3 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → π ∈ ℂ) |
4 | 1, 3 | mulcld 10994 | . 2 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → (2 · π) ∈ ℂ) |
5 | recn 10960 | . . . . 5 ⊢ (𝑆 ∈ ℝ → 𝑆 ∈ ℂ) | |
6 | 5 | adantr 481 | . . . 4 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → 𝑆 ∈ ℂ) |
7 | 6 | halfcld 12216 | . . 3 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → (𝑆 / 2) ∈ ℂ) |
8 | 7 | sincld 15835 | . 2 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → (sin‘(𝑆 / 2)) ∈ ℂ) |
9 | 2ne0 12075 | . . . 4 ⊢ 2 ≠ 0 | |
10 | 9 | a1i 11 | . . 3 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → 2 ≠ 0) |
11 | 0re 10976 | . . . . 5 ⊢ 0 ∈ ℝ | |
12 | pipos 25613 | . . . . 5 ⊢ 0 < π | |
13 | 11, 12 | gtneii 11085 | . . . 4 ⊢ π ≠ 0 |
14 | 13 | a1i 11 | . . 3 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → π ≠ 0) |
15 | 1, 3, 10, 14 | mulne0d 11625 | . 2 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → (2 · π) ≠ 0) |
16 | 6, 1, 3, 10, 14 | divdiv1d 11780 | . . . . 5 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ((𝑆 / 2) / π) = (𝑆 / (2 · π))) |
17 | simpr 485 | . . . . . 6 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ¬ (𝑆 mod (2 · π)) = 0) | |
18 | 2rp 12732 | . . . . . . . . 9 ⊢ 2 ∈ ℝ+ | |
19 | pirp 25614 | . . . . . . . . 9 ⊢ π ∈ ℝ+ | |
20 | rpmulcl 12750 | . . . . . . . . 9 ⊢ ((2 ∈ ℝ+ ∧ π ∈ ℝ+) → (2 · π) ∈ ℝ+) | |
21 | 18, 19, 20 | mp2an 689 | . . . . . . . 8 ⊢ (2 · π) ∈ ℝ+ |
22 | mod0 13592 | . . . . . . . 8 ⊢ ((𝑆 ∈ ℝ ∧ (2 · π) ∈ ℝ+) → ((𝑆 mod (2 · π)) = 0 ↔ (𝑆 / (2 · π)) ∈ ℤ)) | |
23 | 21, 22 | mpan2 688 | . . . . . . 7 ⊢ (𝑆 ∈ ℝ → ((𝑆 mod (2 · π)) = 0 ↔ (𝑆 / (2 · π)) ∈ ℤ)) |
24 | 23 | adantr 481 | . . . . . 6 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ((𝑆 mod (2 · π)) = 0 ↔ (𝑆 / (2 · π)) ∈ ℤ)) |
25 | 17, 24 | mtbid 324 | . . . . 5 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ¬ (𝑆 / (2 · π)) ∈ ℤ) |
26 | 16, 25 | eqneltrd 2860 | . . . 4 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ¬ ((𝑆 / 2) / π) ∈ ℤ) |
27 | sineq0 25676 | . . . . 5 ⊢ ((𝑆 / 2) ∈ ℂ → ((sin‘(𝑆 / 2)) = 0 ↔ ((𝑆 / 2) / π) ∈ ℤ)) | |
28 | 7, 27 | syl 17 | . . . 4 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ((sin‘(𝑆 / 2)) = 0 ↔ ((𝑆 / 2) / π) ∈ ℤ)) |
29 | 26, 28 | mtbird 325 | . . 3 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ¬ (sin‘(𝑆 / 2)) = 0) |
30 | 29 | neqned 2952 | . 2 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → (sin‘(𝑆 / 2)) ≠ 0) |
31 | 4, 8, 15, 30 | mulne0d 11625 | 1 ⊢ ((𝑆 ∈ ℝ ∧ ¬ (𝑆 mod (2 · π)) = 0) → ((2 · π) · (sin‘(𝑆 / 2))) ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1542 ∈ wcel 2110 ≠ wne 2945 ‘cfv 6431 (class class class)co 7269 ℂcc 10868 ℝcr 10869 0cc0 10870 · cmul 10875 / cdiv 11630 2c2 12026 ℤcz 12317 ℝ+crp 12727 mod cmo 13585 sincsin 15769 πcpi 15772 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-rep 5214 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7580 ax-inf2 9375 ax-cnex 10926 ax-resscn 10927 ax-1cn 10928 ax-icn 10929 ax-addcl 10930 ax-addrcl 10931 ax-mulcl 10932 ax-mulrcl 10933 ax-mulcom 10934 ax-addass 10935 ax-mulass 10936 ax-distr 10937 ax-i2m1 10938 ax-1ne0 10939 ax-1rid 10940 ax-rnegex 10941 ax-rrecex 10942 ax-cnre 10943 ax-pre-lttri 10944 ax-pre-lttrn 10945 ax-pre-ltadd 10946 ax-pre-mulgt0 10947 ax-pre-sup 10948 ax-addf 10949 ax-mulf 10950 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rmo 3074 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4846 df-int 4886 df-iun 4932 df-iin 4933 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6200 df-ord 6267 df-on 6268 df-lim 6269 df-suc 6270 df-iota 6389 df-fun 6433 df-fn 6434 df-f 6435 df-f1 6436 df-fo 6437 df-f1o 6438 df-fv 6439 df-isom 6440 df-riota 7226 df-ov 7272 df-oprab 7273 df-mpo 7274 df-of 7525 df-om 7705 df-1st 7822 df-2nd 7823 df-supp 7967 df-frecs 8086 df-wrecs 8117 df-recs 8191 df-rdg 8230 df-1o 8286 df-2o 8287 df-er 8479 df-map 8598 df-pm 8599 df-ixp 8667 df-en 8715 df-dom 8716 df-sdom 8717 df-fin 8718 df-fsupp 9105 df-fi 9146 df-sup 9177 df-inf 9178 df-oi 9245 df-card 9696 df-pnf 11010 df-mnf 11011 df-xr 11012 df-ltxr 11013 df-le 11014 df-sub 11205 df-neg 11206 df-div 11631 df-nn 11972 df-2 12034 df-3 12035 df-4 12036 df-5 12037 df-6 12038 df-7 12039 df-8 12040 df-9 12041 df-n0 12232 df-z 12318 df-dec 12435 df-uz 12580 df-q 12686 df-rp 12728 df-xneg 12845 df-xadd 12846 df-xmul 12847 df-ioo 13080 df-ioc 13081 df-ico 13082 df-icc 13083 df-fz 13237 df-fzo 13380 df-fl 13508 df-mod 13586 df-seq 13718 df-exp 13779 df-fac 13984 df-bc 14013 df-hash 14041 df-shft 14774 df-cj 14806 df-re 14807 df-im 14808 df-sqrt 14942 df-abs 14943 df-limsup 15176 df-clim 15193 df-rlim 15194 df-sum 15394 df-ef 15773 df-sin 15775 df-cos 15776 df-pi 15778 df-struct 16844 df-sets 16861 df-slot 16879 df-ndx 16891 df-base 16909 df-ress 16938 df-plusg 16971 df-mulr 16972 df-starv 16973 df-sca 16974 df-vsca 16975 df-ip 16976 df-tset 16977 df-ple 16978 df-ds 16980 df-unif 16981 df-hom 16982 df-cco 16983 df-rest 17129 df-topn 17130 df-0g 17148 df-gsum 17149 df-topgen 17150 df-pt 17151 df-prds 17154 df-xrs 17209 df-qtop 17214 df-imas 17215 df-xps 17217 df-mre 17291 df-mrc 17292 df-acs 17294 df-mgm 18322 df-sgrp 18371 df-mnd 18382 df-submnd 18427 df-mulg 18697 df-cntz 18919 df-cmn 19384 df-psmet 20585 df-xmet 20586 df-met 20587 df-bl 20588 df-mopn 20589 df-fbas 20590 df-fg 20591 df-cnfld 20594 df-top 22039 df-topon 22056 df-topsp 22078 df-bases 22092 df-cld 22166 df-ntr 22167 df-cls 22168 df-nei 22245 df-lp 22283 df-perf 22284 df-cn 22374 df-cnp 22375 df-haus 22462 df-tx 22709 df-hmeo 22902 df-fil 22993 df-fm 23085 df-flim 23086 df-flf 23087 df-xms 23469 df-ms 23470 df-tms 23471 df-cncf 24037 df-limc 25026 df-dv 25027 |
This theorem is referenced by: dirkerper 43606 |
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