Christoph Helmberg

	2012
25		Frank Göring, Christoph Helmberg, Susanna Reiss: Graph realizations associated with minimizing the maximum eigenvalue of the Laplacian. Math. Program. 131(1-2): 95-111 (2012)
	2011
24		Frank Göring, Christoph Helmberg, Markus Wappler: The rotational dimension of a graph. Journal of Graph Theory 66(4): 283-302 (2011)
	2010
23		Frank Fischer, Christoph Helmberg: Dynamic Graph Generation and Dynamic Rolling Horizon Techniques in Large Scale Train Timetabling. ATMOS 2010: 45-60
22		Christoph Helmberg, Susanna Reiss: A note on Fiedler vectors interpreted as graph realizations. Oper. Res. Lett. 38(4): 320-321 (2010)
	2008
21		Frank Fischer, Christoph Helmberg, Jürgen Janßen, Boris Krostitz: Towards Solving Very Large Scale Train Timetabling Problems by Lagrangian Relaxation. ATMOS 2008
20		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
19		Michael Armbruster, Christoph Helmberg, Marzena Fügenschuh, Alexander Martin: On the Graph Bisection Cut Polytope. SIAM J. Discrete Math. 22(3): 1073-1098 (2008)
18		Frank Göring, Christoph Helmberg, Markus Wappler: Embedded in the Shadow of the Separator. SIAM Journal on Optimization 19(1): 472-501 (2008)
	2007
17		Christoph Helmberg, Stefan Röhl: A Case Study of Joint Online Truck Scheduling and Inventory Management for Multiple Warehouses. Operations Research 55(4): 733-752 (2007)
	2006
16		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
15		Frank Göring, Christoph Helmberg, Markus Wappler: The rotational Dimension of a graph. Electronic Notes in Discrete Mathematics 27: 37-38 (2006)
	2005
14		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
13		Christoph Helmberg: Numerical evaluation of SBmethod. Math. Program. 95(2): 381-406 (2003)
	2002
12		Christoph Helmberg: Semidefinite programming. European Journal of Operational Research 137(3): 461-482 (2002)
11		Christoph Helmberg, Krzysztof C. Kiwiel: A spectral bundle method with bounds. Math. Program. 93(2): 173-194 (2002)
	2000
10		Christoph Helmberg, Franz Rendl, Robert Weismantel: A Semidefinite Programming Approach to the Quadratic Knapsack Problem. J. Comb. Optim. 4(2): 197-215 (2000)
9		Christoph Helmberg, Franz Rendl: A Spectral Bundle Method for Semidefinite Programming. SIAM Journal on Optimization 10(3): 673-696 (2000)
	1999
8		Christoph Helmberg: The m-Cost ATSP. IPCO 1999: 242-258
	1998
7		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		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		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	[14] [16] [19] [20]
2	Dieter W. Fellner	[1] [3]
3	Frank Fischer	[21] [23]
4	Marzena Fügenschuh	[14] [16] [19] [20]
5	Frank Göring	[15] [18] [24] [25]
6	Jürgen Janßen	[21]
7	Nikolay Jetchev	[14] [16]
8	Krzysztof C. Kiwiel	[7] [11]
9	Boris Krostitz	[21]
10	Alexander Martin	[14] [16] [19] [20]
11	Bojan Mohar	[2]
12	Svatopluk Poljak	[2] [4]
13	Susanna Reiss	[22] [25]
14	Franz Rendl	[2] [4] [5] [7] [9] [10]
15	Stefan Röhl	[17]
16	Markus Wappler	[15] [18] [24]
17	Robert Weismantel	[5] [10]
18	Henry Wolkowicz	[4]

Colors in the list of coauthors

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