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* GNU Scientific Library 1.13 released
@ 2009-09-09  7:41 Brian Gough
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From: Brian Gough @ 2009-09-09  7:41 UTC (permalink / raw)
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Version 1.13 of the GNU Scientific Library (GSL) is now available.
GSL provides a large collection of routines for numerical computing 
in C.

This is a maintenance release, which fixes reported bugs and upgrades
the build system to the latest autoconf and automake.  The full NEWS
file entry is appended below.

The file details are:      (2.9 MB)  (GPG signature)
  02db78b9583bc7b2a577da6f45f5dd9f23ef737e       (sha1 checksum)

The GSL project homepage is

GSL is free software distributed under the GNU General Public License.

Thanks to everyone who reported bugs and contributed improvements.

Brian Gough
(GSL Maintainer)


* What is new in gsl-1.13:

** Upgraded to latest autoconf and automake (autoconf-2.64,

** Fixed the rk4 and bspline allocators to avoid invalid free()
   calls under out of memory conditions. [bug #27194, #27236]

** 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. [bug #27180]

** Added new functions to set MISER and VEGAS Monte Carlo integration
   parameters, and to examine VEGAS chi-squared value and intermediate

** 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

** 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

** 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

** 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 [bug #22859] and the incorrect
   termination of the series in certain cases is fixed [bug #26706].

** 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 [bug #25077]

** 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. [bug #25039]

** All functions for freeing allocated memory now accept a NULL
   pointer, following the standard C convention for free(). [bug

** 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. [bug #26807]

** 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. [bug #26871]

** Improved the implementation of gsl_ran_discrete_preproc to avoid
   internal errors due to inconsistencies from excess precision on
   some platforms. [bug #26502]

** 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. [bug #26503]

** 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 [bug #26255].

** 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 [bug #25413].

** Increased the number of terms in gsl_sf_mathieu_a and
   gsl_sf_mathieu_b to improve convergence in difficult regions [bug

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