Computationally Easy Outlier Detection via Projection Pursuit with Finitely Many Directions Satyaki Mazumder 1 and Robert Serfling 2 Indian Institute of Science, Education and Research and University of Texas at Dallas December, 2011 1 Indian Institute of Science, Education and Research, Kolkata, India 2 Department of Mathematics, University of Texas at Dallas, Richardson, Texas 75080-3021, USA. Email: serfling@utdallas.edu. Website: www.utdallas.edu/∼serfling. Support by NSF Grants DMS-0805786 and DMS-1106691 and NSA Grant H98230-08-1-0106 is gratefully ac- knowledged.