_See all documentation for this version [here](https://ampform.rtfd.io/en/0.15.3)._
🐛 Bug fixes
- Use squared `FormFactor` in `EnergyDependentWidth` (425)
📝 Documentation
- Hide sympified attributes from expression classes (424)
_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.15.2...0.15.3)._
0.15.2
_See all documentation for this version [here](https://ampform.rtfd.io/en/0.15.2)._
⚠️ Enhancements and optimizations
- Blatt–Weisskopf is now formulated with spherical Hankel function for arbitrary angular momentum (418) - Split latex expressions with `terms_per_line` argument in `aslatex()` (414)
✨ New features
- Implemented `FormFactor` expression class (422)
⚠️ API changes
- URLs of the API page ([ampform.rtfd.io](https://ampform.readthedocs.io)) now end in `.html` again (#421)
🐛 Bug fixes
- `**kwargs` are now passed to `aslatex` iterable implementation (420)
📝 Documentation
- `_latex_repr_()` as method implementation to `unevaluated` is now explained with examples (416) - Switched to author-year citation style (419)
_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.15.1...0.15.2)._
0.15.1
_See all documentation for this version [here](https://ampform.rtfd.io/en/0.15.1)._
⚠️ Enhancements and optimizations
- SymPy caches are now written to the user cache directory (407) - SymPy caches are written to a different path for different versions of SymPy (409) - [`ampform.io.aslatex()`](https://ampform.readthedocs.io/0.15.1/api/ampform.io/#ampform.io.aslatex) now accepts custom keywords arguments for downstream dispatch overwrites (413)
📝 Documentation
- Added `versionadded` to function descriptions (410) - Set correct widths and gammas in [K-matrix widget](https://ampform.readthedocs.io/0.15.1/usage/dynamics/k-matrix/#interactive-visualization) (408)
_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.15.0...0.15.1)._
0.15.0
_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.12)._
⚠️ API changes
- Implement `SpinAlignment` interface (306) - Deprecate `set_dynamics()` method (305 and 400) - Remove `HelicityModel.sum_components()` (304) - Extract `BuilderConfiguration` class (303) - Rename isobar Wigner-D and CG functions (302) - Split `helicity` and `kinematics` module (301)
⚠️ Changes that may affect behavior
- Remove factor 16 pi from phsp factor (403)
✨ New features
Implemented Dalitz-Plot Decomposition (307)
> [!WARNING] > Experimental: see https://github.com/ComPWA/ampform/issues/309
📝 Documentation
- Show unaligned amplitudes in spin alignment page (321)
_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.14.11..0.15.0)._
0.14.11
_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.11)._
⚠️ Enhancements and optimizations
- Adapt implementation to QRules v0.10 (362 and 347)
🔨 Maintenance
- Import v0.15 refactorings into v0.14 (399)
🖱️ Developer Experience
- Switch to Ruff formatter (398)
_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.14.10...0.14.11)._
0.14.10
_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.10)._
✨ New features
- Added `UnevaluatableIntegral` class for numerical integration (394)
⚠️ Enhancements and optimizations
- A warning is now raised if an `unevaluated` class defines `_latex_repr` instead of `_latex_repr_` (396)
🐛 Bug fixes
- Fixed latex rendering of certain `unvevaluated` expression classes (389)
📝 Documentation
- Updated links to the new [compwa.github.io](https://compwa.github.io) website (#387) - Remove `.html` from page URLs on [ampform.rtfd.io](https://ampform.rtfd.io) (#388) - Usage of the `argument()` function is now better documented (396)
🔨 Maintenance
- Methods that are supposed to override methods of the base class are now marked with `override` (397) - Applied new Ruff preview linting and new `black` formatting (395)
_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.14.8...0.14.10)._