2c5700ad96
notable changes besides bugfixes are: ** Multifit routines now handle iterations where |f| is already minimised to zero, without division by zero. ** Numerical derivatives should now be calculated using the gsl_deriv_forward, gsl_deriv_central and gsl_deriv_backward functions, which accept a step-size argument in addition to the position x. The original gsl_diff functions (without the step-size) are deprecated. ** The tridiagonal matrix solvers gsl_linalg_solve_symm_tridiag, gsl_linalg_solve_tridiag, gsl_linalg_solve_symm_cyc_tridiag, gsl_linalg_solve_cyc_tridiag now use the GSL_ERROR macro to report errors, instead of simply returning an error code. The arguments to these functions must now use exact lengths with no additional elements. For cyclic systems all vectors must be of length N, for tridiagonal systems the offdiagonal elements must be of length N-1. ** The singular value decomposition routines gsl_linalg_SV_decomp and gsl_linalg_SV_decomp_mod now handle the SVD of a column vector (N=1, arbitrary M), which can occur in linear fitting. ** Added Stefan-Boltzmann constant and Thomson cross section to physical constants |
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