test release 1.11.90

[Brian Gough <bjg at gnu dot org>]

There is a test release for gsl-1.12 at

  ftp://alpha.gnu.org/gnu/gsl/gsl-1.11.90.tar.gz
  ftp://alpha.gnu.org/gnu/gsl/gsl-1.11.90.tar.gz.sig

Please try it out and report any problems here.  Thanks.  I've
upgraded libtool, autoconf and automake to the latest versions.  Other
changes from the NEWS file are below.

-- 
Brian Gough


** Upgraded to latest libtool, autoconf and automake (libtool-2.2.6,
   autoconf-2.63, automake-1.10.2)

** Improved the convergence of gsl_sf_gamma_inc_P for x/a ~=~ 1 and
   large x,a.  Fixes problems with large arguments in cdf functions
   such as gsl_cdf_chisq_Pinv(x,nu) [bug 24704].

** Fixed gsl_ran_gamma_knuth to handle the case of a >= UINT_MAX [bug
   #24897]

** Added gsl_bspline_eval_deriv to compute bspline derivatives
   (Rhys Ulerich)

** Added a faster simplex mininimser gsl_multimin_fminimizer_nmsimplex2
   which is O(N) instead of O(N^2) [bug #24418]

** Improved the original chi-squared formula in gsl_monte_vegas to
   avoid catastrophic cancellation [bug #24510].  The previous formula
   could return incorrect or negative values for relative errors <
   1e-8, which could occur when integrating very smooth functions.

** Added new auxiliary functions gsl_cheb_order, gsl_cheb_size,
   gsl_cheb_coeffs for Chebyshev series [bug #21830]

** Updated license of the reference manual to GNU FDL version 1.3.

** Fixed a bug where the gsl_isinf function would return +1 for -Inf
   on systems where isinf(-Inf) returns the non-standard value +1.
   [bug #24489]

** Added missing functions gsl_vector_complex_{isnonneg,add,sub,mul,
   div,scale,add_constant} and gsl_matrix_complex_float_isnonneg [bug
   #22478]

** Cross compilation should now work for x86 hosts.

** Fixed a bug in gsl_interp_accel_find() where values lying on the
   upper boundary between interpolation points could return the index
   from the lower side. [bug #24211]

** Fixed gsl_linalg_solve_cyc_tridiag so that its output respects the
   solution vector's stride. Previously the x_stride value was ignored
   causing the output to be incorrect for non-unit stride. [bug #24162]

** Corrected a bug in the series calculation of gsl_sf_ellint_Kcomp
   for k close to 1. [bug #24146]

** Extended gsl_linalg_QRPT_update to handle rectangular matrices.
   Corrected definition of the update formula in the manual for
   both gsl_linalg_QR_update and gsl_linalg_QRPT_update.

** Added routine gsl_linalg_cholesky_invert

** Fixed a bug the simplex algorithm which caused the second highest
   point to be incorrectly equal to the first when the first value was
   the highest, which could cause suboptimal convergence. [bug #23192]

** Fixed a problem with convergence for inverse gamma and chisq
   distribitions, gsl_cdf_gamma_{P,Q}inv and gsl_cdf_chisq_{P,Q}inv.
   [bug #23101]

** Improved the handling of constant regions in Vegas by eliminating
   spurious excess precision when computing box variances.

** Fixed a potential division by zero in gsl_monte_miser when the
   left/right weight factors decrease below 1.

** Fixed incorrect dimensions check in gsl_matrix_sub{row,column}