19 Answers votes newest views recent 1Newton equations, second order equation and (im)possible motions 2sequences with a fractal dimension 6Does Physics need non-analytic smooth functions? 3fibonacci series mod a number 1Random linear recurrence relations 22- and 3-body problems when gravity is not inverse-square 0Measure 0 sets on the line with Hausdorff dimension 1 2Spectrum of the sum of generators for irrational rotation algebra 9Expected number of steps for a discrete random walk to visit every point on an N-dimensional rectangular lattice 4What is the right notion of self-dual (two-dimensional) percolation in R^4? 0A differential equation 2Question on consecutive integers with similar prime factorizations 3Can I derive the Boltzmann distribution by an invariance argument? 1How well does a truncated fourier expansion of a stepfunction perform near the expansionpoint 1The Jacobi Identity for the Poisson Bracket 2Quadratic Diophantine equations solver 1Unit triangles with vertices on circles 10Examples of common false beliefs in mathematics. 6How can one best link a circle to a straight line by an arc of continuously varying curvature?