Results 1 to 10 of about 17,741 (69)

Improving estimates for discrete polynomial averages [PDF]

open access: yes, 2020
For a polynomial $P$ mapping the integers into the integers, define an averaging operator $A_{N} f(x):=\frac{1}{N}\sum_{k=1}^N f(x+P(k))$ acting on functions on the integers.
Han, Rui   +4 more
core   +3 more sources

Basic Hypergeometric Functions as Limits of Elliptic Hypergeometric Functions [PDF]

open access: yes, 2009
We describe a uniform way of obtaining basic hypergeometric functions as limits of the elliptic beta integral. This description gives rise to the construction of a polytope with a different basic hypergeometric function attached to each face of this ...
Rains, Eric M., van de Bult, Fokko J.
core   +5 more sources

Riemann sums over polytopes [PDF]

open access: yes, 2006
We show that the Euler-MacLaurin formula for Riemann sums has an n-dimensional analogue in which intervals on the line get replaced by convex polytopes.Comment: 13 ...
Guillemin, Victor, Sternberg, Shlomo
core   +3 more sources

THE INEQUALITIES OF HELDER AND MINKOVSKY AND THEIR GENERALIZATIONS

open access: yesФізико-математична освіта
Formulation of the Problem. A large amount of mathematical literature is devoted to classical inequalities. Helder's inequalities, a special case of which is the Cauchy-Buniakovsky inequality, as well as Minkowski's, which is a polygon inequality in a ...
Yuriy Bokhonov
doaj   +1 more source

Thirty-two Goldbach Variations

open access: yes, 2005
We give thirty-two diverse proofs of a small mathematical gem--the fundamental Euler sum identity zeta(2,1)=zeta(3) =8zeta(\bar 2,1). We also discuss various generalizations for multiple harmonic (Euler) sums and some of their many connections, thereby ...
Abramowitz M.   +30 more
core   +1 more source

BMO-estimation and Almost Everywhere Exponential Summability of Quadratic Partial Sums of Double Fourier Series

open access: yes, 2013
It is proved a $BMO$-estimation for quadratic partial sums of two-dimensional Fourier series from which it is derived an almost everywhere exponential summability of quadratic partial sums of double Fourier ...
Goginava, U.   +2 more
core   +1 more source

Moment conditions in strong laws of large numbers for multiple sums and random measures

open access: yes, 2017
The validity of the strong law of large numbers for multiple sums $S_n$ of independent identically distributed random variables $Z_k$, $k\leq n$, with $r$-dimensional indices is equivalent to the integrability of $|Z|(\log^+|Z|)^{r-1}$, where $Z$ is the ...
Brunk   +23 more
core   +1 more source

Entanglement entropy for non-coplanar regions in quantum field theory

open access: yes, 2011
We study the entanglement entropy in a relativistic quantum field theory for regions which are not included in a single spatial hyperplane. This geometric configuration cannot be treated with the Euclidean time method and the replica trick.
Blanco, David D., Casini, Horacio
core   +1 more source

Gaussian Subordination for the Beurling-Selberg Extremal Problem [PDF]

open access: yes, 2011
We determine extremal entire functions for the problem of majorizing, minorizing, and approximating the Gaussian function $e^{-\pi\lambda x^2}$ by entire functions of exponential type.
Carneiro, Emanuel   +2 more
core  

Summation formula inequalities for eigenvalues of the perturbed harmonic oscillator

open access: yes, 2016
We derive explicit inequalities for sums of eigenvalues of one-dimensional Schr\"{o}dinger operators on the whole line. In the case of the perturbed harmonic oscillator, these bounds converge to the corresponding trace formula in the limit as the number ...
Freitas, Pedro, Kennedy, James B.
core   +1 more source

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