The complexity of uniform distribution
The Connell sum sequence.
The critical values of certain Dirichlet series.
The cube recurrence.
The cyclicity problem for the images of Q-rational series
We show that it is decidable whether or not a given Q-rational series in several noncommutative variables has a cyclic image. By definition, a series r has a cyclic image if there is a rational number q such that all nonzero coefficients of r are integer powers of q.
The cyclicity problem for the images of Q-rational series
We show that it is decidable whether or not a given Q-rational series in several noncommutative variables has a cyclic image. By definition, a series r has a cyclic image if there is a rational number q such that all nonzero coefficients of r are integer powers of q.
The D(1)-extensions of D(-1)-triples 1,2,c and integer points on the attached elliptic curves
The Davenport constant of a box
Given an additively written abelian group G and a set X ⊆ G, we let (X) denote the monoid of zero-sum sequences over X and (X) the Davenport constant of (X), namely the supremum of the positive integers n for which there exists a sequence x₁⋯xₙ in (X) such that for each non-empty proper subset I of 1,...,n. In this paper, we mainly investigate the case when G is a power of ℤ and X is a box (i.e., a product of intervals of G). Some mixed sets (e.g., the product of a group by a box) are studied...
The density of the set of sums
The Diophantine equation
It is shown that for a given squarefree positive integer D, the equation of the title has no solutions in integers x > 0, m > 0, n ≥ 3 and y odd, nor unless D ≡ 14 (mod 16) in integers x > 0, m = 0, n ≥ 3, y > 0, provided in each case that n does not divide the class number of the imaginary quadratic field containing √(-2D), except for a small number of (stated) exceptions.
The diophantine equations .
The distance between terms of an algebraic recurrence sequence.
The distribution of trees.
The distribution of Farey numbers.
The Distribution of Farey Points.
The distribution of second order linear recurrence sequences mod
The distribution of the sum-of-digits function
By using a generating function approach it is shown that the sum-of-digits function (related to specific finite and infinite linear recurrences) satisfies a central limit theorem. Additionally a local limit theorem is derived.
The divisor function on residue classes I
The EKG sequence.
The equation and related dispersions.