Approximation algorithm for multiway-cut

Given a graph $G(V,E)$ and a set $T\subset V$ of $k$ terminal vertices, a multiway-cut is a set $C\subset E$ of edges such that in $G'(V,E-C)$, no path exists between any two nodes of $T$. The multiway-cut problem is defined as finding the multiway-cut where $\vert C\vert$ is minimal. Multi-way cut terminal problem is known to be NP-hard for $k \geq 3$.

Again, using approximation we can make a faster algorithm.

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This work was done in collaboration with Romolo Marotta during preparation for the exam of Theoretical Computer Science at University “La Sapienza” – Italy

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