The equation x+y=1 in finitely generated groups
The Erdős-Ginzburg-Ziv theorem in Abelian non-cyclic groups.
The Erdős-Heilbronn problem for finite groups
The Erdős-Turán property for a class of bases
The Euler series transformation and the binomial identities of Ljunggren, Munarini and Simons.
The factor-difference set of integers
The Family of Metallic Means
The Fibonacci number of a grid graph and a new class of integer sequences.
The fractional part of and Beatty sequences
The function and some well-known sequences.
The Gergonne -pile trick and the base counting system. (El truco de pilas de Gergonne y el sistema de numeración de base .)
The Golden Section, Fibonacci Series and New Hyperbolic Models of Nature
The greatest common divisor of two recursive functions.
The Haar measure of certain sets in the Bohr group
The Hankel transform and some of its properties.
The Haros-Farey sequence at two hundred years. A survey.
The independence number of a subset of an Abelian group.
The integer sequence A002620 and upper antagonistic functions.
The intersection of recurrence sequences
The inverse problem for representation functions for general linear forms.