v0.2.1

Breaking changes

• Decomposition routines (svd / qr / lq / eigh) now honor a corrected charge-carrying side convention; results may differ when the non-default side was previously selected.
• lazyabstractmethod pattern removed; abstract hooks are now concrete methods on the appropriate *Common mixin. Affects external subclassers of internal mixins.
• Absorb-mode handling standardized via a new Absorb class across linalg modules — accepted values/normalization are unified across sparse and flat backends.

Enhancements

• einsum: multi-term einsum via cotengra contraction paths.
• Cholesky: new cholesky (and cholesky_regularized) for all array types (sparse/flat, abelian/fermionic), with flat-backend support contributed in (#25).
• Decompositions:
  • svd_rand_truncated for randomized truncated SVD.
  • qr_via_cholesky and lq_via_cholesky.
  • svd_via_eig_truncated for the flat backend.
  • svd_via_eig gained an eps parameter for stabilizing small singular values.
  • Flat svd_via_eig now supports the full range of Absorb options and shortcuts.
  • Unified lq, svd, svd_truncated, svd_via_eig, svd_via_eig_truncated, qr, and eigh_truncated onto a shared _split interface in ArrayCommon.
• Performance: lexsort and phase computations reworked for faster jax.jit tracing (#31); int packing dtype tightened.
• Reshape: refactored calc_reshape_args with broader test coverage.
• Architecture: many methods unified into BosonicCommon; new tests/test_no_method_overrides.py enforces the single-definition MRO rule.
• Docs: initial API reference, ReadTheDocs build infrastructure, RTD badge, and reference updates (#30).
• Tooling: pixi run pytest task with SYMMRAY_DEBUG=1; renamed test envs (testpyold/testpymid/testpynew); CI simplified to use the pixi task.

Bug fixes

• Fixed einsum for single-term expressions.
• Fixed reshape with an ambiguous -1 in newshape.
• Fixed charge-carrying side behavior in decompositions.
• Fixed dtype handling in charge shift.
• Fixed cholesky correctness bugs uncovered during multi-backend rollout.

New Contributors

• @ChenAo-Phys made their first contribution in #25

Full Changelog: v0.2.0...v0.2.1

v0.2.0

What's Changed

Breaking changes:

• rename oddpos -> dummy_modes and tweak behavior
• spinful local basis, change order, see vmc energy compatibility tests

Enhancements:

• add to_pytree and from_pytree methods
• possibly preserve label when contracting arrays
• add flat kwarg to operator constructors
• Add kwargs to utils.from_dense function by @Quantumgunhee in #19
• fermi_hubbard_spinless: add pairing term

Bug fixes:

• various fixes for using symmray with torch and jax
• replace tensor index with autoray 'take' for torch compatibility by @sjdu10 in #23

Full Changelog: v0.1.1...v0.2.0

v0.1.1

What's Changed

• support flat fermionic with torch vmap
• add symmray.take

• upgrade transpose for singleton dimensions by @jcmgray in #1
• change in-place operation x*=y to x = x*y in truncated-SVD by @sjdu10 in #2
• Bump mamba-org/setup-micromamba from 1 to 2 by @dependabot[bot] in #4
• symmetry line location by @Quantumgunhee in #9
• Bump astral-sh/setup-uv from 5 to 6 by @dependabot[bot] in #11
• Bump actions/checkout from 4 to 5 by @dependabot[bot] in #12
• Bump prefix-dev/setup-pixi from 0.9.0 to 0.9.1 by @dependabot[bot] in #13
• solve_abelian for 2d input by @Quantumgunhee in #14
• MPS helper function by @Quantumgunhee in #17
• Bump prefix-dev/setup-pixi from 0.9.1 to 0.9.3 by @dependabot[bot] in #16
• Bump actions/checkout from 5 to 6 by @dependabot[bot] in #18

New Contributors

• @jcmgray made their first contribution in #1
• @sjdu10 made their first contribution in #2
• @dependabot[bot] made their first contribution in #4
• @Quantumgunhee made their first contribution in #9

Full Changelog: https://github.com/jcmgray/symmray/commits/v0.1.1