Another abstraction of the Erdős-Szekeres happy end theorem.
Another Space-Filling Trefoil Knot.
Answer to one of Fishburn's questions: ``Isosceles planar subsets'' [Discrete Comput. Geom. 19 (1998), no. 3, 391--398]
Our short note gives the affirmative answer to one of Fishburn’s questions.
Aperiodic Tiles.
Areas of lattice polygons, applied to computer graphics
Around the proof of the Legendre-Cauchy lemma on convex polygons.
Around the Razumov-Stroganov conjecture: proof of a multi-parameter sum rule.
Arrangement of hyperplanes. I. Rational functions and Jeffrey-Kirwan residue
Arrangements and Milnor fibres.
Arrangements d'hyperplans et sommes de Gauss
Arrangements of arcs and pseudocircles.
Arrangements of hyperplanes and Lie algebra homology.
Arrangements of Oriented Hyperplanes.
Asymptotic estimates for best and stepwise approximation of convex bodies II.
Asymptotic volume formulae and hyperbolic ball packing.
Atomic surfaces, tilings and coincidences II. Reducible case
The atomic surfaces of unimodular Pisot substitutions of irreducible type have been studied by many authors. In this article, we study the atomic surfaces of Pisot substitutions of reducible type.As an analogue of the irreducible case, we define the stepped-surface and the dual substitution over it. Using these notions, we give a simple proof to the fact that atomic surfaces form a self-similar tiling system. We show that the stepped-surface possesses the quasi-periodic property, which implies that...
Ausbohrung von Rhomben
Aztec diamonds and Baxter permutations.