The IncrementalFE library builds on the GalerkinTools library and adds some functionality related to the solution of transient problems by one step time integration algorithms. In particular, it includes a Newton-Raphson based solver for the non-linear problems arising in each time step.

Currently, restriction is made to problems, which involve only first order time derivatives.

The library requires the library GalerkinTools (https://github.com/sebastian-stark/GalerkinTools) to be installed on your system.

Installation of the IncrementalFE library is through cmake:

1. place library source files into some folder /path/to/folder/IncrementalFE (you can use git clone https://github.com/sebastian-stark/IncrementalFE.git for this)
2. cd /path/to/folder/
3. mkdir build
4. cd build
5. cmake -DCMAKE_INSTALL_PREFIX=/path/to/install/dir ../IncrementalFE
6. make install
7. optionally set an environment variable to INCREMENTAL_FE_DIR=/path/to/install/dir
8. optionally run the tests (first cd /path/to/folder/build, then ctest)

If you want to use the spline library of T. Kluge (https://kluge.in-chemnitz.de/opensource/spline/) for the manufactured solution capability (class ManufacturedSolutionSpline), you must pass the path to the header file to cmake by a flag -DSPLINE_DIR=/path/to/spline/header

Acknowledgements: The IncrementalFE library has been developed during a project supported by the Deutsche Forschungsgemeinschaft (DFG) under Grants STA 1593/1-1 and STA 1593/2-1.