# Items where Subject is "68-XX Computer science > 68Qxx Theory of computing > 68Q17 Computational difficulty of problems (lower bounds, completeness, difficulty of approximation, etc.)"

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- MSC Classification Numbers (7)
- 68-XX Computer science (7)
- 68Qxx Theory of computing (7)
**68Q17 Computational difficulty of problems (lower bounds, completeness, difficulty of approximation, etc.)**(7)

- 68Qxx Theory of computing (7)

- 68-XX Computer science (7)

**7**.

## Article

Buchheim, Christoph and Cameron, Peter J. and Wu, Taoyang
(2009)
*On the Subgroup Distance Problem.*
**Published in: **
Discrete Mathematics Vol. 309 (4).
pp. 962-968.

Engels, Birgit and Schrader, Rainer
(2015)
* Freight car dispatching with generalized flows.*
**Published in: **
Networks Vol. 66 (1).
pp. 33-39.
ISSN 1097-0037

Fuchs, Bernhard and Faigle, Ulrich and Peis, Britta
(2007)
*Note on maximal split-stable subgraphs.*
**Published in: **
Discrete applied mathematics Vol. 155 (15).
pp. 2031-2038.

## Proceedings article

Engels, Birgit and Krumke, Sven and Schrader, Rainer and Zeck, Christiane
(2009)
*Integer Flow with Multipliers: The Special Case of Multipliers 1 and 2.*
**Published In:**
Proceedings of the 8th Cologne Twente Workshop on Graphs and Combinatorial Optimization 2009, pp. 239-243.

Fuchs, Bernhard
(2006)
*On the Hardness of Range Assignment Problems.*
**Published In:**
Algorithms and Complexity : 6th Italian Conference, CIAC 2006, Rome, Italy, May 29-31, 2006. Proceedings, Lecture notes in computer science. 3998 Springer 2006, pp. 127-138.

Groß, Martin and Kappmeier, Jan-Philipp W. and Schmidt, Daniel R. and Schmidt, Melanie
(2012)
*Approximating Earliest Arrival Flows in Arbitrary Networks.*
**Published In:**
Algorithms – ESA 2012, Lecture Notes in Computer Science. 7501 Springer 2012, pp. 551-562.

## Thesis

Fuchs, Bernhard
(2007)
*On the Approximability of Range Assignment Problems.*
PhD thesis.