id summary reporter owner description type status milestone component version severity resolution keywords cc 9927 Bug in zero's finding of bessel functions Peter Zwart John Maddock "The zero finding routine for cylindrical bessel functions gives incorrect values for a large number of nodes for a variety of orders. Examples are order = 3/2, first zero. Reported at 8.3825 but should be at 8.1825, i.e. 0.2 lower. I check refined all first 100 zeros up to order 100+1/2 using a golden section search against a spherical bessel function. Where there are errors, they are always 0.2. " Bugs closed To Be Determined math Boost 1.55.0 Cosmetic worksforme special functions