Yau-Zaslow formula on K3 surfaces for non-primitive classes
Year of astronomy: Mankind's place in the Universe
Yearly variations of global plasma densities in the topside ionosphere at middle and low latitudes
Yet a short proof of the 4-colour theorem
Yet another basic analogue of Graf's addition formula
Yet another construction of the central extension of the loop group
Yet another delooping machine
Yet another generalization of Postnikov's hook length formula for binary trees
Yet Another Hat Game
Yet another inverse function theorem
Yet another look at Harris' ergodic theorem for Markov chains
Yet Another Poincare's Polyhedron Theorem
Yet another proof from the Book: the Gauss theorem on regular polygons
Yet another proof of Goedel's completeness theorem for first-order classical logic
Yet another proof of Marstrand's Theorem
Yet another proof of Szemeredi's theorem
Yet another proof of the Nualart-Peccati criterion
Yet another short proof of the 4-colour theorem
Yet Another Single Law for Lattices
Yet another solution to the Burnside problem for matrix semigroups