# An estimate for the volume entropy of nonpositively curved graph-manifolds

@article{Buyalo2002AnEF, title={An estimate for the volume entropy of nonpositively curved graph-manifolds}, author={Sergei Buyalo}, journal={St Petersburg Mathematical Journal}, year={2002}, volume={15}, pages={41-47} }

Let M be a closed 3-dimensional graph manifold. We prove that h(g)>1 for each geometrization g of M, where h(g) is the topological entropy of geodesic flow of g.

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