Currently open bug reports can be viewed here.
All bug reports including closed ones can be viewed here.
Added two new special functions - trigamma
Fixed namespace scope constants so they are constexpr on conforming compilers,
Fixed various cases of spurious under/overflow in the incomplete beta and
gamma functions, plus the elliptic integrals, with thanks to Rocco Romeo.
Fix 3-arg legendre_p
and legendre_q functions
to not call the policy based overload if the final argument is not actually
Cleaned up some dead code in the incomplete beta function, see #10985.
Fixed extreme-value pdf for large valued inputs, see #10938.
Large update to the Elliptic integral code to use Carlson's latest algorithms
- these should be more stable, more accurate and slightly faster than before.
Also added support for Carlson's RG integral.
Added ellint_d, jacobi_zeta and heuman_lambda elliptic
Switched documentation to use SVG rather than PNG graphs and equations
- browsers seem to have finally caught up!
Fix some spurious overflows in the incomplete gamma functions (with thanks
to Rocco Romeo).
Fix bug in derivative of incomplete beta when a = b = 0.5 - this also effects
several non-central distributions, see 10480.
Fixed some corner cases in round.
Don't support 80-bit floats in cstdfloat.hpp if standard library support
Breaking change: moved a number of non-core
headers that are predominantly used for internal maintenance into
libs/math/include_private. The headers effected
boost/math/tools/test.hpp. You can continue to use these headers
libs/math/include_private to your compiler's include
Breaking change: A number of distributions
and special functions were returning the maximum finite value rather than
raising an overflow_error,
this has now been fixed, which means these functions now behave as documented.
However, since the default behavior on raising an overflow_error
is to throw a
std::overflow_error exception, applications
which have come to reply rely on these functions not throwing may experience
exceptions where they did not before. The special functions involved are
gamma_p_inv, gamma_q_inv. The distributions
involved are Pareto
Binomial Distribution, Binomial
Squared Distribution, Gamma
chi squared Distribution, Inverse
Gamma Distribution. See #10111.
Fix round and trunc functions so they can
be used with integer arguments, see #10066.
Fix Halley iteration to handle zero derivative (with non-zero second derivative),
Fix Geometric distribution use of Policies, see #9833.
Fix corner cases in the negative binomial distribution, see #9834.
Fix compilation failures on Mac OS.
Changed version number to new Boost.Math specific version now that we're
in the modular Boost world.
numbers, changed arbitrary precision tgamma/lgamma to use Sterling's
approximation (from Nikhar Agrawal).
Added first derivatives of the Bessel functions: cyl_bessel_j_prime,
(from Anton Bikineev).
Fixed buggy Student's t example code, along with docs for testing sample
means for equivalence.
in root finding code better, see #9225.
Add option to explicitly enable/disable use of __float128 in constants
code, see #9240.
Cleaned up handling of negative values in Bessel I0 and I1 code (removed
dead code), see #9512.
Fixed handling of very small values passed to tgamma
and lgamma so they
don't generate spurious overflows (thanks to Rocco Romeo).
#9672 PDF and
CDF of a Laplace distribution throwing domain_error Random variate
can now be infinite.
Fixed several corner cases in rising_factorial,
with thanks to Rocco Romeo.
Fixed several corner cases in rising_factorial,
(thanks to Rocco Romeo).
whose value did not match the name (and was unused by Boost.Math),
Suppress numerous warnings (mostly from GCC-4.8 and MSVC) #8384,
Fixed PGI compilation issue #8333.
Fixed PGI constant value initialization issue that caused erf to generate
incorrect results #8621.
Prevent macro expansion of some C99 macros that are also C++ functions
Fixed Student's T distribution to behave correctly with huge degrees of
freedom (larger than the largest representable integer) #8837.
Make some core functions usable with
double even when the platform has
no standard library
long double support #8940.
Fix error handling of distributions to catch invalid scale and location
parameters when the random variable is infinite #9042
Add workaround for broken <tuple> in Intel C++ 14 #9087.
Improve consistency of argument reduction in the elliptic integrals #9104.
Fix bug in inverse incomplete beta that results in cancellation errors
when the beta function is really an arcsine or Student's T distribution.
Fix issue in Bessel I and K function continued fractions that causes spurious
Add improvement to non-central chi squared distribution quantile due to
Major reorganization to incorporate other Boost.Math like Integer Utilities
Integer Utilities (Greatest Common Divisor and Least Common Multiple),
quaternions and octonions. Making new chapter headings.
Added many references to Boost.Multiprecision and
as an example of a User-defined Type (UDT).
Added Clang to list of supported compilers.
Fixed constants to use a thread-safe cache of computed values when used
at arbitrary precision.
Added finding zeros of Bessel functions
More accuracy improvements to the Bessel J and Y functions from Rocco Romeo.
Fixed nasty cyclic dependency bug that caused some headers to not compile
Fixed bug in tgamma
that caused spurious overflow for arguments between 142.5 and 143.
Fixed bug in raise_rounding_error that caused it to return an incorrect
result when throwing an exception is turned off #7905.
Added minimal __float128 support.
Fixed bug in edge-cases of poisson quantile #8308.
Adjusted heuristics used in Halley iteration to cope with inverting the
incomplete beta in tricky regions where the derivative is flatlining. Example
is computing the quantile of the Fisher F distribution for probabilities
smaller than machine epsilon. See ticket #8314.
Fixed issues #7325,
Fixed mistake in calculating pooled standard deviation in two-sample students
t example #7402.
Improve complex acos/asin/atan, see #7290,
Improve accuracy in some corner cases of cyl_bessel_j
thanks to suggestions from Rocco Romeo.
Improve accuracy of Bessel J and Y for integer orders thanks to suggestions
from Rocco Romeo.
Corrected moments for small degrees of freedom #7177
(reported by Thomas Mang).
Added Airy functions and Jacobi Elliptic functions.
Corrected failure to detect bad parameters in many distributions #6934 (reported
by Florian Schoppmann) by adding a function check_out_of_range to test
many possible bad parameters. This test revealed several distributions
where the checks for bad parameters were ineffective, and these have been
Fixed issue in Hankel functions that causes incorrect values to be returned
for x < 0 and ν odd, see #7135.
Fixed issues #6517,
Permitted infinite degrees of freedom #7259
implemented using the normal distribution (requested by Thomas Mang).
Much enhanced accuracy for large degrees of freedom ν and/or large non-centrality
by switching to use the Students t distribution (or Normal distribution
for infinite degrees of freedom) centered at delta, when δ / (4 * ν) <
epsilon for the floating-point type in use. #7259.
It was found that the incomplete beta was suffering from serious cancellation
errors when degrees of freedom was very large. (That has now been fixed
in our code, but any code based on Didonato and Morris's original papers
(probably every implementation out there actually) will have the same issue).
See Boost-1.52 - some items were added but not listed in time for the release.
Promoted math constants to be 1st class citizens, including convenient
access to the most widely used built-in float, double, long double via
Added the Owen's T function and Skew Normal distribution written by Benjamin
Sobotta: see Owens T and skew_normal_distrib.
Added Hankel functions cyl_hankel_1,
cyl_hankel_2, sph_hankel_1 and sph_hankel_2.
Corrected issue #6627
nonfinite_num_put formatting of 0.0 is incorrect based on a patch
submitted by K R Walker.
Changed constant initialization mechanism so that it is thread safe even
for user-defined types, also so that user defined types get the full precision
of the constant, even when
double does not. So for example
128-bit rational approximations will work with UDT's and do the right thing,
may be only 64 or 80 bits.
Fixed issue in
which causes Y8.5(4π) to yield a NaN.
Deprecated wrongly named
math constant in favour of
(with underscore separator). (issue #6199).
Refactored test data and some special function code to improve support
for arbitary precision and/or expression-template-enabled types.
Added new faster zeta function evaluation method.
Corrected CDF complement for Laplace distribution (issue #6151).
Corrected branch cuts on the complex inverse trig functions, to handle
signed zeros (issue #6171).
Fixed bug in
which caused incorrect overflow errors to be raised for negative n
Also fixed minor/cosmetic/configuration issues #6120,
Added new series evaluation methods to the cyclic Bessel I, J, K and Y
functions. Also taken great care to avoid spurious over and underflow of
these functions. Fixes issue #5560
Added an example of using Inverse Chi-Squared distribution for Bayesian
statistics, provided by Thomas Mang.
Added tests to use improved version of lexical_cast which handles C99 nonfinites
without using globale facets.
Corrected wrong out-of-bound uniform distribution CDF complement values
Enabled long double support on OpenBSD (issue #6014).
Changed nextafter and related functions to behave in the same way as other
implementations - so that nextafter(+INF, 0) is a finite value (issue
Changed tuple include configuration to fix issue when using in conjunction
with Boost.Tr1 (issue #5934).
Changed class eps_tolerance to behave correctly when both ends of the range
are zero (issue #6001).
Fixed missing include guards on prime.hpp (issue #5927).
Removed unused/undocumented constants from constants.hpp (issue #5982).
Fixed missing std:: prefix in nonfinite_num_facets.hpp (issue #5914).
Minor patches for Cray compiler compatibility.
Added changesign function to sign.hpp to facilitate addition of nonfinite
Addition of nonfinite facets from Johan Rade, with tests, examples of use
for C99 format infinity and NaN, and documentation.
Added tests and documentation of changesign from Johan Rade.
Added Wald, Inverse Gaussian and geometric distributions.
Added information about configuration macros.
Added support for mpreal as a real-numbered type.
Added warnings about potential ambiguity with std random library in distribution
and function names.
Added inverse gamma distribution and inverse chi_square and scaled inverse
Editorial revision of documentation, and added FAQ.
Fixed incorrect range and support for Rayleigh distribution.
Fixed numerical error in the quantile of the Student's T distribution:
the function was returning garbage values for non-integer degrees of freedom
between 2 and 3.
Significantly improved performance for the incomplete gamma function and
Added support for MPFR as a bignum type.
Added some full specializations of the policy classes to reduce compile
Added logistic and hypergeometric distributions, from Gautam Sewani's Google
Summer of Code project.
Added Laplace distribution submitted by Thijs van den Berg.
Updated performance test code to include new distributions, and improved
the performance of the non-central distributions.
Added SSE2 optimised Lanczos approximation
code, from Gautam Sewani's Google Summer of Code project.
Fixed bug in cyl_bessel_i that used an incorrect approximation for ν = 0.5,
also effects the non-central Chi Square Distribution when ν = 3, see bug
Fixed minor bugs #2873.
Added Johan Råde's optimised floating point classification routines.
Fixed code so that it compiles in GCC's -pedantic mode (bug report #1451).
Improved accuracy and testing of the inverse hypergeometric functions.
Added Noncentral Chi Squared Distribution.
Added Noncentral Beta Distribution.
Added Noncentral F Distribution.
Added Noncentral T Distribution.
Added Exponential Integral Functions.
Added Zeta Function.
Added Rounding and Truncation functions.
Added Compile time powers of runtime bases.
Added SSE2 optimizations for Lanczos evaluation.
Added Policy based framework that allows fine grained control over function
Breaking change: Changed default behaviour
for domain, pole and overflow errors to throw an exception (based on review
feedback), this behaviour can be customised using Policy's.
Breaking change: Changed exception thrown
when an internal evaluation error occurs to boost::math::evaluation_error.
Breaking change: Changed discrete quantiles
to return an integer result: this is anything up to 20 times faster than
finding the true root, this behaviour can be customised using Policy's.
Polynomial/rational function evaluation is now customisable and hopefully
faster than before.
Added performance test program.
Moved Xiaogang Zhang's Bessel Functions code into the library, and brought
them into line with the rest of the code.
Added C# "Distribution Explorer" demo application.
Implemented the main probability distribution and density functions.
Added more factorial functions.
Implemented the Hermite, Legendre and Laguerre polynomials plus the spherical
harmonic functions from TR1.
Moved Xiaogang Zhang's elliptic integral code into the library, and brought
them into line with the rest of the code.
Moved Hubert Holin's existing Boost.Math special functions into this library
and brought them into line with the rest of the code.
Implement preview release of the statistical distributions.
Added statistical distributions tutorial.
Implemented root finding algorithms.
Implemented the inverses of the incomplete gamma and beta functions.
Rewrite erf/erfc as rational approximations (valid to 128-bit precision).
Integrated the statistical results generated from the test data with Boost.Test:
uses a database of expected results, indexed by test, floating point type,
platform, and compiler.
Improved lgamma near 1 and 2 (rational approximations).
Improved erf/erfc inverses (rational approximations).
Implemented Rational function generation (the Remez method).
Implement gamma/beta/erf functions along with their incomplete counterparts.
Generate high quality test data, against which future improvements can
Provide tools for the evaluation of infinite series, continued fractions,
and rational functions.
Provide tools for testing against tabulated test data, and collecting statistics
on error rates.
Provide sufficient docs for people to be able to find their way around
Sandbox and trunk last synchonised at revision: .