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An exact method of calculating the variance of a pooled data set is presented. Its major advantages over the many other methods are that it is simple, is easily derived and remembered, and requires no assumptions. The result can be…

Data Analysis, Statistics and Probability · Physics 2010-07-08 Joseph W. Rudmin

We develop a general method for lower bounding the variance of sequences in arithmetic progressions mod $q$, summed over all $q \leq Q$, building on previous work of Liu, Perelli, Hooley, and others. The proofs lower bound the variance by…

Number Theory · Mathematics 2016-02-08 Adam J. Harper , Kannan Soundararajan

We prove an elementary lemma concerning primitive amalgams and use it to greatly simplify the proof of the Sims conjecture in the case of almost simple groups.

Group Theory · Mathematics 2021-02-15 László Pyber , Gareth Tracey

We give a proof of the uniform convergence of Fourier series, using the methods of nonstandard analysis.

Analysis of PDEs · Mathematics 2013-11-17 Tristram de Piro

In this paper we give a simple, short, and self-contained proof for a non-trivial upper bound on the probability that a random $\pm 1$ symmetric matrix is singular.

Probability · Mathematics 2020-06-16 Asaf Ferber

Some simple nonlinear recursions which can be completely managed are identified and the behaviour of all their solutions is ascertained.

Exactly Solvable and Integrable Systems · Physics 2024-05-02 Francesco Calogero

The purpose of this article is to present my new proof of the the construction and the convergence theorem of spectral sequences of filtered complexes, which is much shorter and cleaner than the "standard" proof.

Rings and Algebras · Mathematics 2020-02-18 Rui Xiong

We give a simple and a more explicit proof of a mod $4$ congruence for a series involving the little $q$-Jacobi polynomials which arose in a recent study of a certain restricted overpartition function.

Combinatorics · Mathematics 2019-02-19 Atul Dixit

We prove a version of a general transfer theorem for random sequences with independent random indexes in the double array limit setting under relaxed conditions. We also prove its partial inverse providing the necessary and sufficient…

Probability · Mathematics 2015-09-08 V. Yu. Korolev , A. I. Zeifman

In this note, we present a probabilistic proof of the well-known finite geometric series. The proof follows by taking the moments of the sum and the difference of two independent exponentially distributed random variables.

Probability · Mathematics 2020-04-07 Raju Dey , Suchandan Kayal

It is pointed out that the language of quotient groups and wrapped distributions allows an elementary discussion of Benford's Law, and adds arguments supporting wide-spread observability of this statistics.

History and Overview · Mathematics 2016-12-14 Jacek M. Kowalski

We present an astonishingly simple and elegant proof of the celebrated Basel problem.

Classical Analysis and ODEs · Mathematics 2025-06-16 Jesus Retamozo

We study the number of occurrences of any fixed vincular permutation pattern. We show that this statistics on uniform random permutations is asymptotically normal and describe the speed of convergence. To prove this central limit theorem,…

Combinatorics · Mathematics 2023-06-22 Lisa Hofer

In this note, we give an alternate proof of the multinomial theorem using a probabilistic approach. Although the multinomial theorem is basically a combinatorial result, our proof may be simpler for a student familiar with only basic…

General Mathematics · Mathematics 2019-07-25 K. K. Kataria

We present new mixture representations for the generalized Linnik distribution in terms of normal, Laplace, exponential and stable laws and establish the relationship between the mixing distributions in these representations. Based on these…

Probability · Mathematics 2019-07-10 V. Yu. Korolev , A. K. Gorshenin , A. I. Zeifman

We survey the known results about simple permutations. In particular, we present a number of recent enumerative and structural results pertaining to simple permutations, and show how simple permutations play an important role in the study…

Combinatorics · Mathematics 2008-04-18 Robert Brignall

We state and prove a Lemma in 1 variable Calculus, that justifies some arguments previously used to ilustrate non-uniqueness of some generalized physical quantities.

General Mathematics · Mathematics 2007-05-23 P. G. A. Braz e Silva , A. R. R. Papa

We prove an irreducibility criterion for polynomials with power series coefficients generalizing previous known results concerning quasi-ordinary polynomials.

Complex Variables · Mathematics 2016-05-19 Guillaume Rond , Bernd Schober

This paper proves nontrivial bounds for short mixed character sums by introducing estimates for Vinogradov's mean value theorem into a version of the Burgess method.

Number Theory · Mathematics 2015-06-12 D. R. Heath-Brown , L. B. Pierce

We introduce remarkable upper bounds for the interpolation error constants on triangles, which are sharp and given by simple formulas. These constants are crucial in analyzing interpolation errors, particularly those associated with the…

Numerical Analysis · Mathematics 2025-07-18 Kenta Kobayashi