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In [[mathematics]], the '''Bombieri–Vinogradov theorem''' (sometimes simply called '''Bombieri's theorem''') is a major result of [[analytic number theory]], obtained in the mid-1960s, concerning the distribution of primes in arithmetic progressions, averaged over a range of moduli. The first result of this kind was obtained by [[Mark Barban|Barban]] in 1961<ref>{{cite journal |first=M. B. |last=Barban |title=New applications of the 'large sieve' of Yu. V. Linnik |journal=Akad. Nauk. UzSSR Trudy. Inst. Mat. |volume=22 |year=1961 |issue= |pages=1–20 |doi= }}</ref> and the Bombieri–Vinogradov theorem is a refinement of Barban's result. The Bombieri–Vinogradov theorem is named after [[Enrico Bombieri]]<ref>{{cite book |authorlink=Enrico Bombieri |first=E. |last=Bombieri |title=Le Grand Crible dans la Théorie Analytique des Nombres |edition=Seconde |series=Astérisque |volume=18 |location=Paris |year=1987 | zbl=0618.10042 }}</ref> and [[A. I. Vinogradov]],<ref>{{cite journal |first=A. I. |last=Vinogradov |title=The density hypothesis for Dirichlet L-series |language=Russian |journal=Izv. Akad. Nauk SSSR Ser. Mat. |volume=29 |issue=4 |year=1965 |pages=903–934 |mr=197414 }} Corrigendum. ibid. 30 (1966), pages 719-720. (Russian)</ref> who published on a related topic, the [[density hypothesis]], in 1965. Perhaps somewhat unjustly, Barban's name is often forgotten.
 
This result is a major application of the [[large sieve method]], which developed rapidly in the early 1960s, from its beginnings in work of [[Yuri Linnik]] two decades earlier. Besides Bombieri, [[Klaus Roth]] was working in this area.
 
==Statement of the Bombieri–Vinogradov theorem==
Let ''A'' be any positive real number. Then
:<math>\sum_{q\leq Q}\max_{y<x}\max_{1\le a\le q\atop (a,q)=1}\left|\psi(y;q,a)-{y\over\varphi(q)}\right|=O\left(x^{1/2}Q(\log x)^5\right),</math>
if
:<math>x^{1/2}\log^{-A}x\leq Q\leq x^{1/2}.</math>
 
Here <math>\varphi(q)</math> is the [[Euler totient function]], which is the number of summands for the modulus ''q'', and
:<math>\psi(x;q,a)=\sum_{n\le x\atop n\equiv a\bmod q}\Lambda(n),</math>
where <math>\Lambda</math> denotes the [[von Mangoldt function]].
 
A verbal description of this result is that it addresses the error term in the [[Prime number theorem|prime number theorem for arithmetic progressions]], averaged over the moduli ''q'' up to ''Q''. For a certain range of ''Q'', which are around <math>\sqrt x</math> if we neglect logarithmic factors, the error averaged is nearly as small as <math>\sqrt x</math>. This is quite unobvious, and without the averaging is about of the strength of the [[Generalized Riemann Hypothesis]] (GRH).
 
==See also==
*[[Elliott–Halberstam conjecture]] (a generalization of Bombieri–Vinogradov)
*[[Vinogradov's theorem]] (named after [[Ivan Matveyevich Vinogradov]])
 
==Notes==
{{reflist}}
 
==External links==
*{{MathWorld|urlname=BombierisTheorem|title=Bombieri's Theorem}}
 
{{DEFAULTSORT:Bombieri-Vinogradov theorem}}
[[Category:Sieve theory]]
[[Category:Theorems in analytic number theory]]

Latest revision as of 18:07, 13 December 2013

In mathematics, the Bombieri–Vinogradov theorem (sometimes simply called Bombieri's theorem) is a major result of analytic number theory, obtained in the mid-1960s, concerning the distribution of primes in arithmetic progressions, averaged over a range of moduli. The first result of this kind was obtained by Barban in 1961[1] and the Bombieri–Vinogradov theorem is a refinement of Barban's result. The Bombieri–Vinogradov theorem is named after Enrico Bombieri[2] and A. I. Vinogradov,[3] who published on a related topic, the density hypothesis, in 1965. Perhaps somewhat unjustly, Barban's name is often forgotten.

This result is a major application of the large sieve method, which developed rapidly in the early 1960s, from its beginnings in work of Yuri Linnik two decades earlier. Besides Bombieri, Klaus Roth was working in this area.

Statement of the Bombieri–Vinogradov theorem

Let A be any positive real number. Then

qQmaxy<xmax1aq(a,q)=1|ψ(y;q,a)yφ(q)|=O(x1/2Q(logx)5),

if

x1/2logAxQx1/2.

Here φ(q) is the Euler totient function, which is the number of summands for the modulus q, and

ψ(x;q,a)=nxnamodqΛ(n),

where Λ denotes the von Mangoldt function.

A verbal description of this result is that it addresses the error term in the prime number theorem for arithmetic progressions, averaged over the moduli q up to Q. For a certain range of Q, which are around x if we neglect logarithmic factors, the error averaged is nearly as small as x. This is quite unobvious, and without the averaging is about of the strength of the Generalized Riemann Hypothesis (GRH).

See also

Notes

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External links



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    A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running

    The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more

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