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Release Notes

0.11.0

Breaking Changes

  • Rename AtomicSolution to SolutionStep
  • Disable Simulation functionality until EnsembleSolution is added to GeometricEquations.jl

New Features

Documentation

0.10.0

Breaking Changes

  • Refactor TimeSeries, DataSeries and Solution and move to GeometricSolutions.jl
  • Adapt Solution HDF5 interface to default Julia argument order and naming conventions
  • Extract HDF5 functionality from Solutions into separate data structure
  • Remove parallel Solution types

0.9.0

Breaking Changes

  • Move HermiteInterpolation to Integrators and remove Interpolation sub-package
  • Move Equations submodule to GeometricEquations.jl
  • Move Common, Config and Utils submodules to GeometricBase.jl
  • Move TimeSeries, DataSeries and Solution from Solutions types to GeometricBase.jl
  • Remove parallel DataSeries and Solution types

New Features

  • Implement first and second order Degenerate Variational Integrators (DVIs)
  • Add tests for extrapolation methods

Fixes

  • Bugfixes in implicit equations
  • Bugfixes in extrapolation methods
  • Bugfixes in initial guesses
  • Bugfixes in VPRK and VSPARK initialisation
  • Bugfixes in TimeSeries getindex methods

Documentation

  • Add missing docstrings in various places and remove superficial docstrings

0.8.0

Breaking Changes

  • Use RungeKutta.jl for most tableaus and coefficients
  • Move stochastic integrators to separate package
  • Rewrite of most equation types
  • Rename VODE and VDAE to LODE and LDAE for consistency with HODE and HDAE
  • Add optional fields for the secondary constraint to all *DAE equations

New Features

  • Allow for arbitrary data structures as states (still experimental and not fully supported)
  • Add convert methods for PODE and HODE to ODE and SODE

Fixes

  • Countless minor bugfixes

Documentation

  • Add theoretical background for variational integrators, Runge-Kutta and splitting methods
  • Add references for most methods

0.7.0

  • Use CompactBasisFunctions.jl instead of BasisFunctions submodule
  • Use QuadratureRules.jl instead of Quadratures submodule
  • Use SimpleSolvers.jl instead of Solvers submodule
  • Use GeometricProblems.jl instead of TestProblems submodule

0.6.2

  • Bugfix release

0.6.1

  • Bugfix release

0.6.0

Breaking Changes

  • Revise tableaus: align constructor names with RungeKutta.jl

New Features

  • Add new Runge-Kutta tableaus
  • Generalise Lobatto and Radau tableaus to arbitrary number of stages
  • Extend documentation on integrators and tableaus

0.5.1

  • Update documentation
  • Fix HDF5 v0.14 deprecations

0.5.0

  • Moved repository to JuliaGNI
  • Moved CI from Travis to GitHub

Breaking Changes

  • Functions for initial guesses are now called v̄ and f̄ and can be prescribed separately from v and f in PDAE, HDAE, etc.
  • Rename SPARK tableau constructors and unify distinct constructors for Lobatto tableaus with different number of stages

New Features

  • Implement SPARK integrator for index-two DAEs
  • Implement infrastructure for storing internal variables and solver output to atomic solutions
  • Store internal variables of SPARK and VPRK integrators in atomic solution
  • Add various five-stage Lobatto tableaus
  • Add and clean up SPARK tableaus and add docstrings
  • Add functions for checking symplecticity conditions of SPARK tableaus
  • Add Aqua.jl tests

Fixes

  • Fix initial guess warnings in tests by prescribing proper functions for v̄ and f̄ in example problems
  • Fix update_multiplier() method for SPARK integrators

0.4.1

New Features

  • Atomic solutions can now store a NamedTuple of internal variables of the integrator, including nonlinear solver output
  • Output of internal variables has been added to VPRK integrators
  • Add Gauss-Legendre tableaus for implicit partitioned Runge-Kutta methods

Fixes

  • Revision of integrator type hierarchy

0.4.0

New Integrators

  • Runge-Kutta integrators for implicit ODEs (FIRKimplicit and SRKimplicit)
  • Variational Partitioned Runge-Kutta integrator with projection based on internal stages

Fixes

  • Computation of initial guess in all implicit integrators