Translations of Symmetric and Complete Nets.
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'.
Transversal and cotransversal matroids via their representations.
Transversal designs and partitions associated with Frobenius groups.
Transversal lattices.
Transversals of rectangular arrays.
Triples, current graphs and biembeddings.
Twelfth power qualified residue difference sets.
Twisted projective spaces and linear completions of some partial Steiner triple systems.
Two analogues of a classical sequence.
Two Constructions of Oriented Matroids with Disconnected Extension Space.
Two improvements of a result concerning a problem of K. Zarankiewicz
Two interesting oriented matroids.
Two open problems on balanced block designs
Two-level Cretan matrices constructed using SBIBD
Two-level Cretan matrices are orthogonal matrices with two elements, x and y. At least one element per row and column is 1 and the other element has modulus ≤ 1. These have been studied in the Russian literature for applications in image processing and compression. Cretan matrices have been found by both mathematical and computational methods but this paper concentrates on mathematical solutions for the first time. We give, for the first time, families of Cretan matrices constructed using the incidence...
Über die Existenz von Indizenstrukturen mit Regularitätsbedingungen.
Über die Struktur orthogonal-entarteter elliptischer Orthoscheme
Über Morphismen halbmodularer Verbände.
Über projektive Erweiterung affiner Klingenbergscher Ebenen
Über Rösselringe auf dem Brett von 6...2 Zellen.