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The divisor bound « What's new - 0 views

  • Gergely Harcos The precise bound was first proved by Wigert in 1906 using the prime number theorem, while Ramanujan in 1914 observed its elementary character. In fact we can prove the inequality even without knowing unique factorization! All we need to know is that and imply . This property implies as one can inject the set of divisors of into the set of pairs formed of a divisor of and a divisor of : to assign the pair . Once we know we can see for any positive integer that . It follows that , whence also . Now the second exponent changes by a factor less than 2 whenever is increased by 1, so we can certainly find a with . This choice furnishes Wigert’s estimate upon observing that .
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Topics in ergodic number theory - 0 views

  • Ergodic Theory: with a view towards Number Theory, by Einsiedler and Ward Terry Tao's blog Akshay Venkatesh's lecture notes Ben Green's lecture notes
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The analytic theory of algebraic numbers - 0 views

  • The analytic theory of algebraic numbers H. M. Stark Source: Bull. Amer. Math. Soc. Volume 81, Number 6 (1975), 961-972. Primary Subjects: 12–02, 12A50, 12A70 Full-text: Access granted (open access) PDF File (1009 KB)
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[0807.5101] Roth's theorem in Z_4^n - 0 views

  • We show that if A is a subset of Z_4^n containing no three term arithmetic progression in which all the elements are distinct then |A|=o(4^n/n).
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One L of a discovery - 0 views

  • A new mathematical object, an elusive cousin of the Riemann zeta-function, was revealed to great acclaim recently at the American Institute of Mathematics. Ce Bian and Andrew Booker from the University of Bristol showed the first example of a third degree transcendental L-function.
  • Functional equations shed light on the properties of those functions that satisfy them, and for L-functions F(s) the functional equation is:   where q is an integer called the level, d is the degree, and the numbers  are Langland's parameters. is an analytic continuation of the factorial function  that is valid not only for integers but all complex numbers. There are two types of L-functions: algebraic and transcendental. These are classified according to their degree. If the Langland's parameters are rational or algebraic (that is, are complex numbers that are roots of non-zero polynomials with rational coefficients), then the L-function is algebraic. If these numbers are transcendental (that is, non-algebraic, such as  or  , then the L-function is transcendental. The Riemann zeta-function is the L-function where the level is 1, the degree is 1 and the Langland's parameters are 0 — that is, a first degree algebraic L-function. The Bristol researchers showed the first example of a third degree transcendental L-function.
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AIM math: GL(3) Maass forms and L-functions - 0 views

  • wo researchers from the University of Bristol exhibited the first example of a third degree transcendental L-function.
  • "This work was made possible by a combination of theoretical advances and the power of modern computers." During his lecture, Bian reported that it took approximately 10,000 hours of computer time to produce his initial results.
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