Philip N. Klein is an American computer scientist and professor at Brown University.

His research focuses on algorithms for optimization problems in graphs.

Klein is a fellow of the Association for Computing Machinery[1] and a recipient of the National Science Foundation's Presidential Young Investigator Award (1991).

[2] He is a recipient of Brown University's Philip J. Bray Award for Excellence in Teaching in the Sciences (2007) and was a Fellow at the Radcliffe Institute for Advanced Study at Harvard University (2015–16).

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