Subsets of the unit ball the are separated by more than one
Ternary constant weight codes.
Tesselations of multidimensional parallelepipeds.
The densest geodesic ball packing by a type of Nil lattices.
The densest lattice in twenty-four dimensions.
The impossibility of a tesselation of the plane into equilateral triangles whose sidelengths are mutually different, one of them being minimal.
The minimal perimeter for confined deformable bubbles of equal area.
The number of inequivalent optimal covering codes.
Translative packing of a square with sequences of squares
Let S be a square and let S' be a square of unit area with a diagonal parallel to a side of S. Any (finite or infinite) sequence of homothetic copies of S whose total area does not exceed 4/9 can be packed translatively into S'.
Ulam's pathological liar game with one half-lie.
Voronoĭ type criteria for lattice coverings with balls
Zur Zerlegung von Einheitskugelüberdeckungen des E..d in Einheitskugelpackungen
Zur Zerlegung von Kreisüberdeckungen Ü(r,1) der Ebene in zwei Kreispackungen ...(1) und q(r,1)