math - Calculate differential in Fortran -

math - Calculate differential in Fortran -

i want calculate w j=0 n in below function. there written library in fortran?

actually want write programme n user, , print w in output. shall differential , creating equation ln(x)?

that recurrence relation generate n-th order legendre polynomial, , xj , wj, assume writing programme perform gauss-legendre integration (no thought why q(x) there).

this florida state page provides lgpl fortran90 program calculates nodes , weights using tridiagonal-eigenvalue method , writing them external file. seek , collect of contained functions , place them module run-time calculation of nodes , weights.

math fortran mathematical-optimization fortran90 fortran95