API Reference

This page provides a complete reference for the rkstiff package, organized by functionality.

Core Solver

The main solver interfaces for solving stiff differential equations.

`rkstiff.solver`	Base solver infrastructure for all rkstiff PDE solvers
`rkstiff.solveras`	Base solver infrastructure for rkstiff adaptive step PDE solvers
`rkstiff.solvercs`	Base solver infrastructure for rkstiff constant step PDE solvers

ETD (Exponential Time Differencing) methods for stiff differential equations.

`rkstiff.etd`	Exponential Time-Differencing (ETD) Runge-Kutta Methods
`rkstiff.etd34`	Adaptive-Step Fourth Order (Third Order Embedding) Exponential Time-Differencing Integrator
`rkstiff.etd35`	Adaptive-Step Fifth Order (Third Order Embedding) Exponential Time-Differencing Integrator
`rkstiff.etd4`	Constant-Step Fourth-Order Exponential Time-Differencing Integrator
`rkstiff.etd5`	Constant-Step Fifth-Order Exponential Time-Differencing Integrator

IF (Integrating Factor) methods for stiff differential equations.

`rkstiff.if34`	Adaptive-Step Fourth Order (Third Order Embedding) Integrating Factor Integrator
`rkstiff.if4`	Constant-Step Fourth-Order Integrating Factor Integrator
`rkstiff.if45dp`	Integrating factor adaptive step solver of 5th order with 4rd order embedding.

Utilities and helper modules for numerical computations.

`rkstiff.derivatives`	Spectral differentiation utilities for Fourier and Chebyshev grids
`rkstiff.grids`	Grid construction utilities for spectral and transform methods
`rkstiff.models`	Common benchmark models and initial conditions for stiff PDE solvers
`rkstiff.transforms`	Transform utilities for axisymmetric and spectral-space computations

Additional utility functions and helpers.

Logging helper utilities