volume 28, issue 4, P593-606 2002
DOI: 10.1007/s00454-002-2891-4
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Abstract: A graph is called a string graph if its vertices can be represented by continuous curves ("strings") in the plane so that two of them cross each other if and only if the corresponding vertices are adjacent. It is shown that there exists a recursive function f (n) with the property that every string graph of n vertices has a representation in which any two curves cross at most f (n) times. We obtain as a corollary that there is an algorithm for deciding whether a given graph is a string graph. This solves an o…

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