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Contains lively and engaging articles from the lecturers and the participants of the 17th Gokova Geometry-Topology Conference, held in May of 2010. This volume contains Borgeois' notes from his mini-course on contact homology, and an expository article on the solution of the celebrated Arf-Kerviere invariant problem by Hill, Hopkins, and Ravenel, as well as some new research articles.