Abschätzung der Primalfunktion mit elementaren Methoden.
Abundancy “outlaws” of the form .
Acknowledgment of priority: "On some problems of Mąkowski-Schinzel and Erdős concerning the arithmetical functions ϕ and σ" (Colloq. Math. 92 (2002), 111-130)
Addendum to "Continued fractions of some algebraic numbers".
Addidtive representations of integers.
Additive functions with respect to expansions over the set of Gaussian integers
Additive structure of the group of units mod , with core and carry concepts for extension to integers.
Affine invariants, relatively prime sets, and a phi function for subsets of .
Algebraic and combinatorial properties of products [Abstract of thesis]
Algorithme de Jacobi-Perron dans les corps de nombres de degré 4
Algorithme de Jacobi-Perron dans un corps de séries formelles
Aliquot sequence 3630 ends after reach 100 digits.
All elite primes up to 250 billion.
Allgemeine Theorie der kettenbruchähnlichen Algorithmen, in welchen jede Zahl aus drei vorhergehenden gebildet wird.
Almost-even functions as solutions of a linear functional equation
Amicable Pell numbers.
An addendum to the paper: “Arithmetic functions over rings with zero divisors” by Ruangsinsap, Laohakosol and P. Udomkavanich.
An algorithm for a solution of a problem of Frobenius.
An algorithm for finding an algebraic number whose norm is a given rational number.
An algorithm to determine self-producing r-digit g-adic integers.