id summary reporter owner description type status milestone component version severity resolution keywords cc 8116 quadratic_interpolate does not work when bracket starts at zero murphy@… John Maddock On line 200 of boost/math/tools/toms748_solve.hpp, the code should be checking whether the coefficient 'A' of the quadratic polynomial is zero before giving up and calling secant_interpolate, not the variable 'a', which is the lower bound of the bracket. Bugs closed To Be Determined math Boost 1.52.0 Problem fixed