. . . . . . . . "http://en.wikipedia.org/wiki/Radius_of_curvature_(mathematics)"^^ . "http://www.iso.org/iso/catalogue_detail?csnumber=43012"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . "\\(\\rho\\)"^^ . "In geometry, the \"Radius of Curvature\", R, of a curve at a point is a measure of the radius of the circular arc which best approximates the curve at that point." . . . . . . "Radius of Curvature"@en .