Schrödinger operators with empty singularly continuous spectra, (together with K.B. Sinha). Math. Phys., Analysis and Geometry 2 (1999), 223 - 244. Traces and trace norms for semigroup differences, Operator […] Conference in Lambrecht, Birkhäuser, Series: Operator Theory, Vol. 57 , 1992 (Editor together with B. Gramsch and B.-W. Schulze). Mathematical Results in Quantum Mechanics, Conference in Blossin, Birkhäuser, […] (Editor together with B.-W. Schulze). Partial Differential Equations and Spectral Theory, Conference in Clausthal, Birkhäuser, Series: Operator Theory, Vol. 126 , 2001 (Editor together with B.-W. Schulze). Series:
Bounds and Quality Guarantees for Online-Dispatching , 2004, PDF [663 kB] Aspects of Online Routing and Scheduling ,2007, PDF [796 kB] Journals F. Bollwein, S. Westphal, A branch & bound algorithm to determine […] com/article/10.1007%2Fs10878-013-9634-8 C. Thielen, S. Westphal, Complexity and Approximability of the Maximum Flow Problem with Minimum Quantities , Networks, September 2013, Volume 62, Issue 2, Pages 125–131 […] scheduling with precedence constraints , Operations Research Letters, Volume 36, Issue 2, March 2008, Pages 247-249, PDF [92 kB] , http://dx.doi.org/10.1016/j.orl.2007.05.003 S. Westphal, A note on the k-Canadian