Thang Nguyen Bui, Sing Ling Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


The placement problem that minimizes the channel density in the standard cell (polycell) layout is considered. This problem is formalized as a min-cut arrangement problem for a given bipartite graph G equals (A, B, E), where the vertices of A and B are placed on two different rows. It is shown that this problem is NP-hard even when the positions of the vertices in A are fixed. In this restricted version, an O(nlog n) optimal algorithm is given for three-regular bipartite graphs. Also given are a three-approximation algorithm for regular bipartite graphs, i. e. , an algorithm whose answer is guaranteed not to be more than a factor of three of the optimal solution, and a (d plus 1)-approximation algorithm for bipartite graphs with degree at most d.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
Number of pages4
ISBN (Print)0818608145
StatePublished - Dec 1 1987

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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