19 Answers votes newest views recent 0Tools for long-distance collaboration 9From Topological to Smooth and Holomorphic Vector Bundles 5Lie groups bundle 2Which popular games are the most mathematical? 2n-categorical description of Chern classes 3Why is the Leibniz rule a definition for derivations? 2A question on $Isom(p_1^*E,p_2^*E) \rightrightarrows X$ 1Quotient of a compact Lie group by maximal Torus 1Natural connection on U(1) principal bundles over S^2 with Chern number>1 2Topology of the Universal Spinor Field Bundle 2How does one go from Chern--Weil to cohomology classes on BGL(n,C)? 8Tangent bundle and normal bundle in self-product 21A sudden smiley? :-) 6Slick ways to make annoying verifications 2Good papers/books/essays about the thought process behind mathematical research 1Vector space structure on velocity space of manifold 2How to easy calculate card of union of sets? 6Nontrivial examples of non-trivial principal circle bundles 4Writing papers in pre-LaTeX era?