Christoph Helmberg

2008
15	EE	Frank Fischer, Christoph Helmberg, Jürgen Janßen, Boris Krostitz: Towards Solving Very Large Scale Train Timetabling Problems by Lagrangian Relaxation. ATMOS 2008
14	EE	Michael Armbruster, Marzena Fügenschuh, Christoph Helmberg, Alexander Martin: A Comparative Study of Linear and Semidefinite Branch-and-Cut Methods for Solving the Minimum Graph Bisection Problem. IPCO 2008: 112-124
2006
13	EE	Michael Armbruster, Marzena Fügenschuh, Christoph Helmberg, Nikolay Jetchev, Alexander Martin: Hybrid Genetic Algorithm Within Branch-and-Cut for the Minimum Graph Bisection Problem. EvoCOP 2006: 1-12
12	EE	Frank Göring, Christoph Helmberg, Markus Wappler: The rotational Dimension of a graph. Electronic Notes in Discrete Mathematics 27: 37-38 (2006)
2005
11	EE	Michael Armbruster, Marzena Fügenschuh, Christoph Helmberg, Nikolay Jetchev, Alexander Martin: LP-based Genetic Algorithm for the Minimum Graph Bisection Problem. OR 2005: 315-320
2003
10	EE	Christoph Helmberg: Numerical evaluation of SBmethod. Math. Program. 95(2): 381-406 (2003)
2000
9		Christoph Helmberg, Franz Rendl, Robert Weismantel: A Semidefinite Programming Approach to the Quadratic Knapsack Problem. J. Comb. Optim. 4(2): 197-215 (2000)
1999
8	EE	Christoph Helmberg: The m-Cost ATSP. IPCO 1999: 242-258
1998
7	EE	Christoph Helmberg, Krzysztof C. Kiwiel, Franz Rendl: Incorporating Inequality Constraints in the Spectral Bundle Method. IPCO 1998: 423-436
1997
6		Christoph Helmberg: Fixing Variables in Semidefinite Relaxations. ESA 1997: 259-270
1996
5		Christoph Helmberg, Franz Rendl, Robert Weismantel: Quadratic Knapsack Relaxations Using Cutting Planes. IPCO 1996: 175-189
1995
4		Christoph Helmberg, Svatopluk Poljak, Franz Rendl, Henry Wolkowicz: Combining Semidefinite and Polyhedral Relaxations for Integer Programs. IPCO 1995: 124-134
1994
3	EE	Dieter W. Fellner, Christoph Helmberg: Best approximate general ellipses on integer grids. Computers & Graphics 18(2): 143-151 (1994)
1993
2		Christoph Helmberg, Bojan Mohar, Svatopluk Poljak, Franz Rendl: A spectral approach to bandwidth and separator problems in graphs. IPCO 1993: 183-194
1	EE	Dieter W. Fellner, Christoph Helmberg: Robust Rendering of General Ellipses and Elliptical Arcs. ACM Trans. Graph. 12(3): 251-276 (1993)

Coauthor Index

1	Michael Armbruster	[11] [13] [14]
2	Dieter W. Fellner	[1] [3]
3	Frank Fischer	[15]
4	Marzena Fügenschuh	[11] [13] [14]
5	Frank Göring	[12]
6	Jürgen Janßen	[15]
7	Nikolay Jetchev	[11] [13]
8	Krzysztof C. Kiwiel	[7]
9	Boris Krostitz	[15]
10	Alexander Martin	[11] [13] [14]
11	Bojan Mohar	[2]
12	Svatopluk Poljak	[2] [4]
13	Franz Rendl	[2] [4] [5] [7] [9]
14	Markus Wappler	[12]
15	Robert Weismantel	[5] [9]
16	Henry Wolkowicz	[4]

Colors in the list of coauthors