Changelog:

• Features

  • Added Birkhoff-Trjitzinsky asymptotics to extract a formal basis of asymptotic solutions for scalar linear difference equations (LinearRecurrence.asymptotics()).
  • Added new classes to support asymptotic calculations:
    • SeriesMatrix to handle formal power series expansions.
    • GrowthRate to track and compare asymptotic hierarchies.
    • Reducer as the algebraic solver to decouple formal difference systems.
  • Added calculation of the determinant of a pFq CMF axis matrix via a hardcoded formula.
  • Made determinant calculations a built-in CMF functionality.

• Bug Fixes

  • Fixed broken LaTeX rendering of objects in JupyterLab (such as PCF, CMF, and LinearRecurrence) by correctly wrapping the output in math delimiters.
  • Fixed an equality evaluation bug in FlintRational occurring when negations were present in both the numerator and denominator.
  • Fixed pickling cache issues for CMF, pFq, and MeijerG objects by correctly implementing their respective __getstate__ and __setstate__ methods.

• Refactors

  • Replaced custom _repr_latex_ methods with sympy.printing.defaults.Printable inheritance for cleaner and more standardized LaTeX representation.