Skip to content

CHANGELOG.md

Latest commit

 

History

History
137 lines (96 loc) · 5.13 KB

CHANGELOG.md

File metadata and controls

137 lines (96 loc) · 5.13 KB
Raw

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

0.5.0 - 2026-10-09

Added

  • a tester of the module, test/, that needs the core alone: each of the 26 functions is loaded from a stream and checked for its dimension, its value at the starting point and at the optimum of the literature, and its linearization at random points, against finite differences, against the function itself when it is convex, and between the Range and the Subset forms, together with the arguments load() refuses, the kinks, a change of the variables and of the parameters seen by compute(), and the netCDF round trip. The pipeline of the module builds the module alone and runs this tester, the suite that minimizes the functions with the BundleSolver running where that module is

Changed

  • whoever links the module keeps it: the classes of a module register themselves in the factory from a static initialiser, and a linker that drops what looks unused takes the registration away with it, so the target now tells whoever links it to keep the symbol that forces the module in, and on ELF, where naming the symbol is not enough, the library as a whole

Fixed

  • the subgradients of three functions are those of the function computed: Wolfe has 9 and not 9 x_0 as the derivative in x_0 of 9 x_0 + 16 |x_1|, and at the origin gives ( 15 , 0 ) rather than ( 0 , 0 ), which is no subgradient there, or 0 / 0 in the Subset form; Colville1 subtracts the rows of A of its penalty 50 max( 0 , b - A x ) instead of adding them; Gill has the derivative of ( x_i^2 - 0.25 )^2 in its first piece, the sum over the 29 points of the chain rule in its second one, and in its third one no longer reads past the last variable

  • the subgradient of MaxQR is b_j ( x - c_j ) / || x - c_j || of the active piece b_j || x - c_j || + a_j, and 0 at x = c_j, instead of 2 b_j ( x - c_j ), the gradient of the square of the norm; its data in ( - 0.5 , 0.5 ] are drawn as 0.5 - u, which gives the same numbers as before without the distribution with the bounds swapped, whose behaviour is undefined

  • LukFiFunction::get_int_par() returns the current value of a parameter of the base class, not its default

  • the documentation of Lewis says what the function is: nonconvex and unbounded below, the origin being a stationary point and not a minimum

  • load() refuses a function beyond the 26 there are, which it accepted up to 29 as a function valued 0

  • the netCDF round trip of a LukFiBlock works: serialize() writes the function, which deserialize() looks for, and writes no ComputeConfig when all the parameters are at their default, where it dereferenced a null pointer, while deserialize() builds the Variable and the Objective of the Block as load() does

  • makefile-c includes the makefile of the core from where it is

  • on macOS a program linking the module lost the classes the module registers in the factories when the linker dropped the library, as it does under -dead_strip_dylibs, which conda sets: the target now asks the linker for the symbol that forces the module in (-u), which ld64, unlike the ELF linker, counts as a use of the library

  • the starting point of Maxq and Maxl has x_i = - i - 1 computed in double, the subtraction of an unsigned index from zero having given a very large number instead of a negative one

  • LukFiFunction::compute() returns a status, as the interface asks, and not the value of the function, which is read with get_value() as everywhere else

0.4.0 - 2026-09-12

Changed

  • the version of the module is the git tag of its repository, or the VERSION.txt of a release tarball, and the shared library carries it: its SONAME is major.minor while the major is 0, and it is installed with an RPATH relative to itself, so that an installed tree keeps working wherever it is moved

Fixed

  • the global structures of the test functions are static, so that the library links on macOS with no duplicate symbol

0.3.2 - 2024-02-28

Changed

  • adapted to new CMake / makefile organisation

0.3.1 - 2023-05-23

Changed

  • adapted to new load/print interface

Fixed

  • updated long-neglected code to current testing and interface standards

0.3.0 - 2021-02-05

Added

  • Maintenance release.

0.2.0 - 2020-03-06

Added

  • Changelog.

0.1.0 - 2019-11-29

Added

  • First test release.