|Appears in Collections:||Computing Science and Mathematics Journal Articles|
|Peer Review Status:||Refereed|
|Title:||A supernodal formulation of vertex colouring with applications in course timetabling|
Parkes, Andrew J
|Citation:||Burke E, Maracek J, Parkes AJ & Rudova H (2010) A supernodal formulation of vertex colouring with applications in course timetabling, Annals of Operations Research, 179 (1), pp. 105-130.|
|Abstract:||For many problems in scheduling and timetabling, the choice of a mathematical programming formulation is determined by the formulation of the graph colouring component. This paper briefly surveys seven known integer programming formulations of vertex colouring and introduces a new approach using "supernodes". In the definition of George and McIntyre (SIAM J. Numer. Anal. 15(1):90-112, 1978), a "supernode" is a complete subgraph, within which every pair of vertices have the same neighbourhood outside of the subgraph. A polynomial-time algorithm for obtaining the best possible partition of an arbitrary graph into supernodes is given. This makes it possible to use any formulation of vertex multicolouring to encode vertex colouring. Results of empirical tests on benchmark instances in graph colouring (DIMACS) and timetabling (Udine Course Timetabling) are also provided and discussed.|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|Affiliation:||Deputy Principal's Office|
University of Nottingham
University of Nottingham
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