On relatively prime subsets and supersets.
On repdigit polygonal numbers.
On repetitions in frequency blocks of a generalized Fibonacci sequence.
On representation of r-th powers by subset sums
On Representing Integers as Products of the p + 1.
On restricted sumsets in abelian groups of odd order.
On Rödseth's h-bases A... 0 ...1, a..., 2a..., ..., (k - 2)a..., a...
On Rowland's sequence.
On -fibonomials.
On Sequences satisfying .
On sequences of ±1's defined by binary patterns [Book]
On sequences of numbers and polynomials defined by linear recurrence relations of order 2.
On sequences of positive integers
On sequences over a finite abelian group with zero-sum subsequences of forbidden lengths
Let G be an additive finite abelian group. For every positive integer ℓ, let be the smallest positive integer t such that each sequence S over G of length |S| ≥ t has a nonempty zero-sum subsequence of length not equal to ℓ. In this paper, we determine for certain finite groups, including cyclic groups, the groups and elementary abelian 2-groups. Following Girard, we define disc(G) as the smallest positive integer t such that every sequence S over G with |S| ≥ t has nonempty zero-sum subsequences...
On sets of integers containing k elements in arithmetic progression
On sets of natural numbers without solution to a noninvariant linear equation
On short zero-sum subsequences. II.
On Sidon sequences of even orders
On similarity between topologies
Let T 1 and T 2 be topologies defined on the same set X and let us say that (X, T 1) and (X, T 2) are similar if the families of sets which have nonempty interior with respect to T 1 and T 2 coincide. The aim of the paper is to study how similar topologies are related with each other.
On simultaneous arithmetic progressions on elliptic curves.