Quasilinear elliptic systems in divergence form with weak monotonicity.
A refinement of Ball's theorem on Young measures.
An application of van der Waerden's theorem in additive number theory.
A generalization of the Smarandache function to several variables.
Geometrical Aspects of the Circular Billiard Problem.
-harmonic flow
The Josephus problem
We give explicit non-recursive formulas to compute the Josephus-numbers and and explicit upper and lower bounds for (where ) which differ by (for the bounds are even better). Furthermore we present a new fast algorithm to calculate which is based upon the mentioned bounds.
Optimal bounds for the length of rational Collatz cycles
The p-harmonic system with measure-valued right hand side
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