v0.10.1

Manifolds v0.10.1

Diff since v0.10.0

Changed

• identity_element on ProductManifold without RecursiveArrayTools.jl now prints a useful error message.

Merged pull requests:

• Error message for identity_element on ProductManifold without RAT.jl (#739) (@mateuszbaran)

v0.10.0

Manifolds v0.10.0

Diff since v0.9.20

Changed

• Distributions.jl, RecursiveArrayTools.jl and HybridArrays.jl were moved to weak dependencies to reduce load time and improve extensibility.
• translate_diff, inv_diff and thus apply_diff_group, are available for all the groups with invariant tangent vector storage.
• SpecialEuclidean group now has a different default tangent vector representation, the left-invariant one; to get the old representation pass vectors=HybridTangentRepresentation() to the constructor of SpecialEuclidean.
• adjoint_action takes a direction argument; by default it is LeftAction.
• adjoint_action! is the necessary method to implement in groups with left-invariant tangent vector representation.
• Fixed a few typos in the doc string of the SPD fixed determinant description.
• Random point on the MultinomialSymmetricPositiveDefinite manifold was improved to make it more robust.

Added

• Introduced exp_inv and log_inv based on exp_lie and log_lie. They are invariant to the group operation.
• A tutorial about usage of group-related functionality.

Removed

• Deprecated bindings:
  • ExtrinsicEstimation() (should be replaced with ExtrinsicEstimation(EfficientEstimator())),
  • Symplectic (renamed to SymplecticMatrices),
  • SymplecticMatrix (renamed to SymplecticElement).
  • AbstractEstimationMethod (renamed to AbstractApproximationMethod).
  • VectorBundleVectorTransport (renamed to FiberBundleProductVectorTransport).
  • rand on SymplecticMatrices and SymplecticStiefel no longer accepts hamiltonian_norm as an alias for σ.
  • mean! and median! no longer accept extrinsic_method (should be replaced with e = ExtrinsicEstimation(extrinsic_method)).
• As a result of making Distributions.jl and RecursiveArrayTools.jl weak dependencies the following symbols are no longer exported from Manifolds.jl. Essential functionality is still available but distribution-related features may change in the future without a breaking release.
  • ArrayPartition (RecursiveArrayTools.jl needs to be explicitly imported),
  • ProjectedPointDistribution (not exported),
  • normal_tvector_distribution (not exported),
  • projected_distribution (not exported),
  • uniform_distribution (not exported).
• Ability to create non-real SymplecticStiefel and SymplecticGrassmann manifolds; essential functionality was missing so it was removed until a more developed version is developed.

Merged pull requests:

• Manifolds.jl v0.10 (#732) (@mateuszbaran)
• Bump tarides/changelog-check-action from 2 to 3 (#733) (@dependabot[bot])

Closed issues:

• Rename Symplectic to SymplecticMatrices? (#701)
• Add check_point for complex SymplecticStiefel (#735)
• Is base_manifold supposed to commute with ProductManifold? (#738)

v0.9.20

Manifolds v0.9.20

Diff since v0.9.19

Added

• implemented parallel transport on the Grassmann manifold with respect to Stiefel representation

Changed

• since now all exp/log/parallel transport are available for all representations of Grassmann,
  these are now also set as defaults, since they are more exact.

Merged pull requests:

• Implement and document parallel transport on Grassmann. (#731) (@kellertuer)

v0.9.19

Manifolds v0.9.19

Diff since v0.9.18

Changed

• Updated Project.toml compatibility entries.
• Updated CI for Julia 1.11-beta

Fixed

• a few typos in the doc string of the SPD fixed determinant description
• several other typographical errors throughout the documentation

Merged pull requests:

• Fix a few typos for SPDs with fixed Det. (#723) (@kellertuer)
• CompatHelper: add new compat entry for DiffEqCallbacks in [weakdeps] at version 3, (keep existing compat) (#724) (@github-actions[bot])
• CompatHelper: add new compat entry for NLsolve in [weakdeps] at version 4, (keep existing compat) (#725) (@github-actions[bot])
• Update Project.toml for DiffEqCallbacks (#726) (@mateuszbaran)
• fix typos (#728) (@spaette)
• Trying to fix FiniteDifferences + SArray failure (#729) (@mateuszbaran)
• Bump version to 0.9.19 (#730) (@mateuszbaran)

Closed issues:

• typos (#727)

v0.9.18

Manifolds v0.9.18

Diff since v0.9.17

Added

• added the injectivity radius for the Stiefel manifold with Euclidean metric

Merged pull requests:

• Bump julia-actions/cache from 1 to 2 (#721) (@dependabot[bot])
• Implement infectivity radius on Stiefel (#722) (@kellertuer)

Closed issues:

• Implement a check_retraction function. (#599)

v0.9.17

Manifolds v0.9.17

Diff since v0.9.16

Added

• Hyperrectangle manifold with boundary.

Merged pull requests:

• Bump julia-actions/setup-julia from 1 to 2 (#718) (@dependabot[bot])
• Hyperrectangle (#720) (@mateuszbaran)

v0.9.16

Manifolds v0.9.16

Diff since v0.9.15

Merged pull requests:

• Remove bound on NonlinearSolve.jl (#716) (@mateuszbaran)
• Remove bound on PythonCall (#717) (@mateuszbaran)

Closed issues:

• Why does exponential map on the Sphere return points outside of the Sphere? (#715)

v0.9.15

Manifolds v0.9.15

Diff since v0.9.14

Added

• using DocumenterInterLinks for links to other Julia packages documentation.
• Implementation of sectional_curvature, sectional_curvature_min and sectional_curvature_max for several manifolds.
• sectional_curvature_matrix function and a tutorial on coordinate-free curvature.

Changed

• default_vector_transport_method for GeneralUnitaryMatrices other than Rotations was changed to ProjectionTransport.

Fixed

• typographical errors in tutorials/working-in-charts.jl.
• several typographical errors in the docs
• unifies to use two backticks `` for math instead of $ further in the docs

Merged pull requests:

• Bump codecov/codecov-action from 3 to 4 (#707) (@dependabot[bot])
• Fix several typos in the docs (#709) (@kellertuer)
• Fix some typos in working-in-charts example. (#710) (@vtjeng)
• Sectional curvature (#711) (@mateuszbaran)
• 📚Switch to using DocumenterInterLinks.jl (#712) (@kellertuer)

v0.9.14

Manifolds v0.9.14

Diff since v0.9.13

Added

• rand on UnitaryMatrices
• rand on arbitrary GroupManifolds and manifolds with IsGroupManifold trait generating points and elements from the Lie algebra, respectively

Merged pull requests:

• More random randomness on random (no actually all) Lie groups (#706) (@kellertuer)

v0.9.13

Manifolds v0.9.13

Diff since v0.9.12

Added

• added the real symplectic Grassmann manifold SymplecticGrassmann
• Introduce the manifold of HamiltonianMatrices and a wrapper for Hamiltonian matrices
• introduce rand(:HamiltonianMatrices)
• extend rand to also rand! for HamiltonianMatrices, SymplecticMatrices and SymplecticStiefel
• implement riemannian_gradient conversion for SymplecticMatrices and SymplecticGrassmann
• the new manifold of MultinomialSymmetricPositiveDefinite matrices
• rand! for MultinomialDoublyStochastic and MultinomialSymmetric

Deprecated

• Rename Symplectic to SimplecticMatrices in order to have a Symplectic wrapper for such matrices as well in the future for the next breaking change.
• Rename SymplecticMatrix to SymplecticElement to clarify that it is the special matrix J_{2n} and not an arbitrary symplectic matrix.

Fixed

• a bug that cause project for tangent vectors to return wrong results on MultinomialDoublyStochastic

Merged pull requests:

• Symplectic Grassmann (#700) (@kellertuer)
• Multinomial randomness (#702) (@kellertuer)
• Bump actions/cache from 3 to 4 (#704) (@dependabot[bot])