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Free and open source numerical library for C and C++ programmers GSL provides a wide range of mathematical routines such as random number generators, special functions and least-squares fitting. There are over 1000 functions in total with an extensive test suite.The complete range of subject areas covered by the library includes: Roots of Polynomials, Special Functions, Complex Numbers, Vectors and Matrices, BLAS Support, Linear Algebra, Permutations, Sorting and much more. What's New in This Release: · Upgraded to latest autoconf and automake (autoconf-2.64, automake-1.11) · Fixed the rk4 and bspline allocators to avoid invalid free() calls under out of memory conditions. · Fixed a bug in gsl_multimin_fminimizer_nmsimplex2 where the center and size of the simplex were not updated on contract-by-best steps, causing failures in convergence. · Added new functions to set MISER and VEGAS Monte Carlo integration parameters, and to examine VEGAS chi-squared value and intermediate results. · Added the function gsl_bspline_greville_abscissa to compute Greville abscissae for B-splines. · The cumulative distribution functions gsl_cdf_gumbel1_{P,Q} should now handle a larger range of parameters without underflow and overflow. · The header file gsl_const_cgs.h no longer defines values for electromagnetic units. Applications should use gsl_const_cgsm.h instead to obtain the values in the CGS-Magnetic system. The previous values for these units given in gsl_const_cgs.h were ill-defined as the type of CGS electromagnetic system was unspecified (the values were a mixture of CGS units with the Ampere of the MSKA system). The affected constants are GSL_CONST_CGS_BOHR_MAGNETON, GSL_CONST_CGS_ELECTRON_CHARGE, GSL_CONST_CGS_ELECTRON_MAGNETIC_MOMENT, GSL_CONST_CGS_FARADAY, GSL_CONST_CGS_GAUSS, GSL_CONST_CGS_NUCLEAR_MAGNETON, GSL_CONST_CGS_PROTON_MAGNETIC_MOMENT, and GSL_CONST_CGS_ROENTGEN. · The Pochhammer functions gsl_sf_poch(a,x) and gsl_sf_lnpoch(a,x) now handle the special cases where a and a+x are zero or negative integers. · The confluent hypergeometric function gsl_sf_hyperg_U (a,b,x) now handles some cases where x=0. The case where 1+a-b is a negative integer no longer returns an error and the incorrect termination of the series in certain cases is fixed . · Added a new function gsl_poly_eval_derivs to evaluate a polynomial and its derivatives simultaneously. · Added a new univariate minimisation algorithm gsl_min_fminimizer_quad_golden which is a variant of Brent's algorithm with safeguarded step-length adjustment. · Added a new Nelder-Mead minimiser gsl_multimin_fminimizer_nmsimplex2rand which uses a randomly oriented simplex rather than one fixed on the coordinate axes · The texinfo file now uses the dircategory "Software libraries" from the Free Software Directory, as recommended in the Texinfo manual. · The function gsl_ran_exponential now includes zero in its output range. · All functions for freeing allocated memory now accept a NULL pointer, following the standard C convention for free(). · The function gsl_sum_levin_u_accel now handles the special case c_0 + 0 + 0 + 0 + .... that occurs when summing power series c_n*x^n with x=0. · The functions gsl_linalg_LU_solve, gsl_linalg_LU_svx, gsl_linalg_LU_refine, gsl_linalg_LU_invert and their complex equivalents now return an error for singular matrices. · The multifit LMDER hybrid solvers now check the return code of the user-supplied function in the gsl_multifit_fdfsolver_set method. · Improved the implementation of gsl_ran_discrete_preproc to avoid internal errors due to inconsistencies from excess precision on some platforms. · Corrected gsl_sf_hyperg_2F1(a,b,c,x) to not give a domain error in the case where c is a negative integer and the series terminates with a finite result. · The C99 inline keyword is now supported, in addition to the previously supported GNU-style inline. · Modified gsl_poly_complex_solve_cubic and gsl_poly_solve_cubic to avoid returning NaNs in cases where excess precision causes a change in the number of roots. · Fixed incorrect length check in gsl_blas_drotm. · Fixed gsl_odeiv_step_gear2 to restore y on step failure · gsl_odeiv_evolve_apply now restores the correct value of t on step failures . · Using make install prefix=DIR now puts correct paths in package config files gsl-config and gsl.pc · Modified gsl_monte_vegas to work around pow() function inaccuracies on MinGW . · Increased the number of terms in gsl_sf_mathieu_a and gsl_sf_mathieu_b to improve convergence in difficult regions

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