What’s New

Breaking Changes

• Drop support for Python 3.7, minimal version is now 3.8. This is necessary for modern build system. Python 3.7 was dropped by NumPy in 2022, this should be no issue.

• Make gftool.precision private (1594c9e). There probably was never any point in using it.

Documentation

• Use NumPy 2 representation in doc strings (b927f3c)

Internal improvements

• Officially support Python 3.13 and 3.14.

• Modernize build tools and dev tools (eaa0c6b)

Bug fixes

• Avoid side effects on the NumPy namespace (45eae68)

• Fully support NumPy 2 (8dca2db, a2df5ef)

0.11.1 (2024-04-27)

Internal improvements

• Officially support Python 3.12 (3d3afa0).

• Comply with NumPy 2 syntax (6980098).

Documentation

• Enforce numpydoc style.

• Update expired links (7f1aa09).

Bug fixes

• Improve slight inaccuracies of dos.

• Fix vectorization of linearprediction functions.

0.11.0 (2022-04-29)

New Features

• Add pole-base Padé analytic continuation polepade (41d57537).

  • Allows determining number of poles avoiding overfitting.

  • Least-squares based approach allowing to include uncertainties of input data.

• Add linearprediction module (b1c8f636).

  • Linear prediction can be used to extend retarded-time Green’s functions.

• Add Padé-Fourier approach to Laplace transform (fe1ac173).

  • Padé-Fourier allows to significantly reduce the truncation error. This allows for contours closer to real-axis for a given maximal time.

  • Linear Padé approximant tt2z_pade based on simple poles

  • Quadratic Hermite-Padé approximant tt2z_herm2 including quadratic branch cuts but introducing ambiguity which branch to choose.

  • Module hermpade implements the necessary approximants.

• Add lattice box with box-shaped DOS (09974a09).

Internal improvements

• Use numpy.testing.assert_allclose for tests, providing more verbose output (dbb8fd7c).

Documentation

• Start to adhere more closely to numpydoc (40d57d45).

0.10.1 (2021-12-01)

New Features

• Officially support Python 3.10

• Add retarded-time Bethe Green’s gf_ret_t function (6ffc7c91)

Internal improvements

• Switch from Travis to GitHub actions #20 (23ba0a34)

  • This adds test for Mac and Windows

Documentation

• Fix various errors using Velin (03ff6c8e)

Bug fixes

• Accept singular constrains in lstsq_ec (167e7886)

• Accurately calculate gftool.lattice.sc.dos around eps=0 (5693184e). Previously, DOS was incorrect for tiny values, e.g. eps=1e-16.

0.10.0 (2021-09-19)

Breaking Changes

• Drop support for Python 3.6, minimal version is now 3.7

• Content of gftool.matrix was renamed more appropriately:

  • xi of Decomposition is now eig, as it contains the eigenvalues

  • New functions decompose_mat for general matrices, decompose_sym for complex symmetric matrices, and decompose_her for Hermitian matrices.

Depreciations

• Deprecate the matrix functions decompose_gf, decompose_hamiltonian, from_gf, and from_hamiltonian.

Documentation

• New index page independent of README, separated Getting started page.

• Improve Tutorial and gftool.matrix

• Generate PDF documentation on ReadTheDocs (3122e1ba)

Internal improvements

• Use eigendecomposition instead of SVD in gftool.beb (0475c110)

• Drop slow asfortranarray in gftool.matrix (4865cc05)

• Use pre-commit (6f4028d3)

0.9.1 (2021-06-01)

Bug fixes

CPA:

• return scalar mu in gftool.cpa.solve_fxdocc_root (10fae4d)

• find mu more reliably

Other New Features

• SIAM: add greater and lesser Green’s functions gf0_loc_gr_t and gf0_loc_le_t (ea541f3)

0.9.0 (2021-05-09)

New Features

Implement cpa and beb to treat disorder (c3bad20c)

0.8.1 (2021-04-25)

New Features

The 3D cubic lattices were added:

• body-centered cubic gftool.lattice.bcc (406acef8)

• face-centered cubic gftool.lattice.fcc (ddd559cb)

0.8.0 (2021-04-17)

New Features

The gftool.lattice module was extended, especially regarding two-dimensional lattice. There were also some enhancements, given DOS moments are now up to order 20, and they should be accurate to machine precision.

The following lattices where added with full interface:

• Simple cubic: gftool.lattice.sc (4e3021) by Andreas Östlin

• Honeycomb: gftool.lattice.honeycomb (7aa3133)

• Triangular: gftool.lattice.triangular (c56f33e)

Local Green’s function and DOS is now also available for the following lattices:

• Lieb: gftool.lattice.lieb (c76e948)

• Kagome: gftool.lattice.kagome (28a41c0)

• Bethe lattice with general coordination: gftool.lattice.bethez (2648cf4)

• Rectangular: gftool.lattice.rectangular

Other New Features

• add retarded time Green’s function give by its poles gftool.pole_gf_ret_t

• added gftool.siam module with some basics for the non-interacting siam

Depreciations

• gftool.density is deprecated and will likely be discontinued. Consider the more flexible gftool.density_iw instead.

Documentation

• Button to toggle the prompt (>>>) was added (46b6f39)

Internal improvements

• Ensure more accurate numpy.sum using partial pairwise summation for generalized ufuncs (2d3baef)

0.7.0 (2020-10-18)

Breaking Changes

• The gftool.pade module had a minor rework. The behavior of filters changed. Future breaking changes are to be expected, the module is not well-structured.

New Features

• add gftool.lattice.onedim for Green’s function of one-dimensional lattice

• add fitting of high-frequency moment to gftool.fourier.iw2tau (e2c92e2)

Other New Features

• add gftool.pade_frequencies (9f492fc)

• add gftool.density_iw function as common interface to calculate occupation number from Matsubara or Padé frequencies

• allow calculation of gftool.lattice.bethe for Bethe lattice at complex points (note, that this is probably not a physically meaningful quantity) (ccbac7b)

• add stress tensor transformation gftool.lattice.square.stress_trafo for 2D (528fb21)

Bug fixes

• Fix constant in gftool.fourier.tau2iw_ft_lin (e2163e3). This error most likely didn’t significantly affect any results for a reasonable number of tau-points.

• gftool.density should work now with gu-style matrices (4deffdf)

Documentation

• Functions exposed at the top level (gftool) should now properly appear in the documentation.

0.6.1