Recently, Frumkin [9] pointed out that none of the well-known algorithms that transform an
integer matrix into Smith [16] or Hermite [12] normal form is known to be polynomially bounded …

Prediction of traffic (like weather forecast), its planning and control are counted among the
great scientific and technological challenges. Similarly, flow of granular material like tablets or …

After this “tour de force” in abstract duality theory, the reader — if there still is any — will
probably be glad to learn that we are now coming back to K n , in order to have a short break …

Given a nonnegative real (m, n) matrixA and positive vectorsu, v, then the biproportional
constrained matrix problem is to find a nonnegative (m, n) matrixB such thatB=diag (x) A diag (y) …

In the late forties, Mathematical Programming became a scientific discipline in its own right.
Since then it has experienced a tremendous growth. Beginning with economic and military …

… Achim Bachem Michael Jünger … Achim Bachem … Die erfolgreiche Tagung Mathematik in
Industrie und Wirtschaft", vorzüglich in Köln im März 1993 organisiert von den Kollegen Bachem, …

The members of the HLG would like to thank the project GRDI2020 for supporting the
meetings logistics and the arrangements for the publication of the final report. GRDI2020 is a …

Alternative Verkehrsangebote wie Anruf-Sammeltaxen, Anruf-Linientaxen, Anrufbusse,
Buergerbusse und Mitfahrgelegenheiten bieten die Moeglichkeit, in nachfrageschwachen …

We present an improvement heuristic for vehicle routing problems. The heuristic finds complex
customer interchanges to improve an initial solution. Our approach is modular, thus it is …

In this paper products are conceptualized as bundles of attributes so that consumers'
perceptions of existing products and their conceptions of ‘ideal’ products can be represented as …