Crystallographic groups are groups which act in a nice way and via isometries on some n-dimensional Euclidean space. They got their name, because in three dimensions they occur as the symmetry groups ...

In 1926–27, Cartan gave a series of lectures in which he introduced exterior forms at the very beginning and used extensively orthogonal frames throughout to investigate the geometry of Riemannian ...

Abstract: This paper establishes that the strong converse holds for some classes of discrete memoryless multimessage multicast networks (DM-MMNs) whose corresponding cut-set bounds are tight, i.e., ...

Abstract: The traveling salesman problem (TSP) is a classic NP-hard combinatorial optimization problem that has drawn extensive research endeavor due to its theoretical significance and a wide variety ...

The course is an introduction to geometry in the plane and in 3-space. Central geometric topics that were not included in the beginner courses are emphasised. The course contains a classification of ...