m0nhawk
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 Apr17 comment Boundary condition not correctly imposed for NDSolve By default, no. NDSolve quiet dumb here, it's only solves the equation with given accuracy and precision. For additional analysis there is at least "StiffnessSwitching" Method for NDSolve. And Stiffness Detection. Apr17 answered Boundary condition not correctly imposed for NDSolve Apr17 comment Boundary condition not correctly imposed for NDSolve First, you have very unstable equation, try various initial values, like 10^-6, 10^-3 and other in the 1/10^6 point. Also, this equation perfectly analytically solvable. Apr17 revised EllipticK error message improved formatting Apr17 comment EllipticK error message Apr17 suggested approved edit on EllipticK error message Apr17 comment Using Runge-Kutta method to find arc length @user27670 Plot3D needs two parameters for plotting, not only t. Does the Plot[tfn[t], {t, 0, 2*Pi}] is what you need? Apr16 revised About the wrong evaluation of an integral improved formatting Apr16 suggested approved edit on About the wrong evaluation of an integral Apr14 comment Unable to Solve (for arclength parametrization) Are you plan to solve for an undefined r? Apr13 revised Integrating ODE's improved overall formatting Apr13 suggested approved edit on Integrating ODE's Apr12 answered Streamline Plot from velocity discrete values Apr12 comment Deriving a Rayleigh distribution Yeah, I know, I just provide a usefull information that other Mathematica version have other output. Apr12 comment Deriving a Rayleigh distribution I'm getting WeibullDistribution[2, Sqrt[2]/Sqrt[1/\[Sigma]^2]] for d2. Mathematica 10.1. Apr12 revised Streamline Plot from velocity discrete values improved formatting Apr12 comment Streamline Plot from velocity discrete values And what is the u and v? Have you looked in the ListStreamPlot documentation? Apr12 suggested approved edit on Streamline Plot from velocity discrete values Apr11 revised RegionPlot returning a number improved with links Apr11 suggested approved edit on RegionPlot returning a number