Release notes#

We provide below release notes for the different versions of COBYQA.

Version

Date

Remarks

1.1.3

2025-11-20

This is a bugfix release.

  1. Solve a concurrency issue (see #183)

1.1.2

2024-09-03

This is a bugfix release.

  1. Make sure that the disregarded arguments of scipy.optimize.Bounds, scipy.optimize.LinearConstraint, and scipy.optimize.NonlinearConstraint are not passed to the minimize function.

1.1.1

2024-03-12

This is a bugfix release.

  1. The objective function values and maximum constraint violations are now those without extreme barriers.

  2. If the returned objective function value or the maximum constraint violation is NaN, the optimization procedure is now considered unsuccessful.

1.1.0

2024-03-11

This is an improvement release.

  1. The computations of the quadratic models have been improved. Instead of using an LBL factorization to solve the KKT conditions, we now employ an eigendecomposition-based method, improving the stability of COBYQA.

  2. Passing unknown constants to the minimize function now raises a warning.

1.0.2

2024-02-08

This is a bugfix release.

  1. The returned value of the minimize function has been fixed (when a feasible point was encountered, the returned point was not necessarily feasible).

  2. Nonlinear constraints can now be passed as a dict.

1.0.1

2023-01-24

This is a bugfix release.

  1. The documentation has been improved.

  2. Typos in the examples have been fixed.

  3. Constants can now be modified by the user.

1.0.0

2023-01-09

This is the initial release.