1. A PL-manifold of nonnegative curvature homeomorphic to S^2 × S^2 is a direct metric product Open Access Author: Orshanskiy, Sergey Title: A PL-manifold of nonnegative curvature homeomorphic to S^2 × S^2 is a direct metric product Graduate Program: Mathematics Keywords: polyhedral spacenonnegative curvatureHopf conjecturedirect metric product File: Download Orshanskiy-dissertation.pdf Committee Members: Dmitri Yu Burago, Dissertation Advisor/Co-AdvisorDmitri Yu Burago, Committee Chair/Co-ChairAnton Petrunin, Committee MemberYuri Zarhin, Committee MemberMark Levi, Committee MemberAdam Smith, Committee Member