v4.3.2

This patch release updates the wheels_only optional dependency to work on more systems.

Added

• Optional dependency: wheels_only for solvers with pre-compiled binaries

Changed

• Update developer notes in the documentation
• Update some solver tolerances in unit tests
• Warn rather than raise when there is no solver detected

Fixed

• CICD: Update micromamba setup action

v4.3.1

This patch release fixes the sign of dual multipliers in the Gurobi interface, and adds corresponding unit tests. Thanks @563925743 for finding this 👍

Fixed

• Gurobi: sign of inequality multipliers (thanks to @563925743)

v4.3.0

This release moves all QP solvers to optional dependencies (#268), along with a healthy batch of corrections to the documentation.

Thanks to @ogencoglu and @ottapav for contributing to this release 👍

Added

• Extend continuous integration to Python 3.11
• Optional dependencies for all solvers in the list available on PyPI

Changed

• Breaking: no default QP solver installed along with the library
• NPPro: update exit flag value to match new solver API (thanks to @ottapav)

Fixed

• Documentation: Add Clarabel to the list of supported solvers (thanks to @ogencoglu)
• Documentation: Correct note in solve_ls documentation (thanks to @ogencoglu)
• Documentation: Correct output of LS example (thanks to @ogencoglu)

v4.2.0

This release adds the ability to load and save problems from/to files.

Added

• Problem.load function
• Problem.save function

v4.1.1

This patch release marks QPALM as a sparse solver only to reflect its API.

Changed

• Mark QPALM as a sparse solver only

v4.1.0

This release adds QPALM, a proximal augmented Lagrangian based solver for (possibly nonconvex) quadratic programs. Check it out!

Added

• New solver: QPALM
• Unit test for internal linear-box inequality combination

Changed

• Internal: refactor linear-box inequality combination function
• Renamed main branch of the repository from master to main

Fixed

• Fix combination of box inequalities with empty linear inequalities
• Gurobi: Account for a slight regression in QPSUT01 performance

v4.0.1

This minor release adds the ability to install specific solvers from PyPI, e.g. pip install qpsolvers[clarabel,daqp,proxqp,scs].

Thanks to @sandeep026 for suggesting this in #247 👍

Added

• Allow installation of a subset of QP solvers from PyPI

v4.0.0

This release adds PIQP, a proximal interior point solver suited to both dense and sparse problems. Thanks to @shaoanlu for implementing this interface 👍

This release ships an API-breaking change in the condition number Problem.cond, which now requires an active set. Thanks to @aescande for bringing this up in #220 👍

Added

• New solver: PIQP
• Type for active set of equality and inequality constraints

Changed

• Breaking: condition number of a problem now requires an active set

v3.5.0

This release adds HPIPM, an interior point solver suited to small to medium-size problems arising in model predictive control and embedded optmization. Thanks to @adamheins for implementing this interface 👍

Added

• New solver: HPIPM

Changed

• MOSEK: Disable CI test on QPSUT03 due to regression with 10.1.8
• MOSEK: Relax test tolerances as latest version is less accurate with defaults

v3.4.0

This release adds support for MOSEK, fixes corner-case residual computations, and has ECOS raise errors on problems its interface does not handle.

Thanks to @aszekMosek for helping with MOSEK integration and @uricohen for bringing up this point 👍

Changed

• Converted THANKS file to CFF
• ECOS: raise a ProblemError if inequality vectors contain infinite values
• ECOS: raise a ProblemError if the cost matrix is not positive definite
• MOSEK is now a supported solver

Fixed

• Residual and duality gap computations when solution is not found
• Update OSQP version to 0.6.2.post9 for testing