irlib

irlib

This "irlib" librarry is only for developers. Please use the "irbasis" library for practical calcultion.

Python library for generating "intermediate-representation" (ir) basis. Please refer to H. Shinaoka, J. Otsuki, M. Ohzeki and K. Yoshimi, PRB 96, 035147 (2017). The basis functions u_l(x) and v_l(y) are orthonormal on the interval [-1,1] with weight 1. The sign of u_l(x) is chosen so that u_l(1) > 0.

Table of Contents

• Requirements
• Installation
• Examples

Requirements

C++11 compiler

MPFR (>= 2.31)

GMP (>= 4.21)

Python 2.7 or 3.x

For building Python binding.

SWIG (>= 3.0)

For building Python binding

Installation

See the following sample for a build. In this case, Python libraries and unit tests are built.

$ cmake \
       -DCMAKE_CXX_FLAGS="-std=c++11" \
       -DCMAKE_INSTALL_PREFIX=$HOME/local \
       -DCMAKE_CXX_COMPILER=clang++ \
       -DTesting=ON \
       path_to_source_file_directory
$ make
$ make test
$ make install

Contributors

Hiroshi Shinaoka, Naoya Chikano, Junya Otsuki

Samples

You can find samples below the directory "samples" in the source directory.

License

All files except for those in the directory "thirdparty" are licensed under MIT license. See LICENSE for more details.

Trouble shooting

In case you have multiple Python installations on your machine, cmake may pick up a wrong one. To force cmake to use the correct one, you can tell the location of the executable like this.

$ cmake -DPYTHON_EXECUTABLE=/usr/local/bin/python3.6 ...(other options)...

Even when the location of the executable is specified, cmake may still pick up wrong Python libraries and header files. In such a case, you must pass the include directory and the location of the Python library to cmake as follows.

$ cmake \
     -DPYTHON_EXECUTABLE=/usr/local/bin/python3.6 \
     -DPYTHON_INCLUDE_DIR=/usr/local/Frameworks/Python.framework/Versions/3.6/include/python3.6m \
     -DPYTHON_LIBRARY=/usr/local/Frameworks/Python.framework/Versions/3.6/lib/libpython3.6m.dylib \
     ... (other options) ...

If you want to force CMake not to find MPFR in the system directory, please set the following two environment variables.

export MPFR_INCLUDE_DIR=$HOME/opt/mpfr/include
export MPFR_LIB_DIR=$HOME/opt/mpfr/lib