Glossary

API: Application programming interface
ASE: Atomic Simulation Environment. See the ASE homepage.
BLAS: Basic linear-algebra subprograms. See the Wikipedia entry.
C: The C programming language.
CC BY 4.0: Creative Commons Attribution 4.0 License. This documentation for all parts of the ViPErLEED project is licensed under the CC BY 4.0 license. The license allows free sharing and adaptation of the source material, but requires attribution to the original authors (e.g. via citation in a scientific publication). For more details see here.
CLI: Command-line interface
conda: The conda package manager for Python. See the conda homepage.
CSV: Comma-separated value format. See the Wikipedia entry.
DFT: Density functional theory
Environment variable: A variable that is set in the environment of a process. It is used to pass information to a process. ViPErLEED uses the environment variable VIPERLEED_TENSORLEED to locate the TensErLEED source code if the path is not given explicitly. See also here.
fcc: Face-centered-cubic crystal structure.
Fortran: The Fortran programming language. One of the first high-level programming languages. It is still heavily used in legacy HPC applications. TensErLEED is written in Fortran 77 and Fortran 90. See the Wikipedia entry.
gcc: GNU compiler collection. See the GCC homepage.
gfortran: The GNU Fortran compiler.
GPLv3: The GNU General Public License version 3. License text.
GUI: Graphical user interface
HPC: High-performance computing
ifort: Intel Fortran compiler.
ImageJ: ImageJ is a public domain image processing and analysis software commonly used in the scientific community. The ViPErLEED spot-tracker, curve editor and several associated utilities are implemented as ImageJ plugins. See also the ImageJ homepage.
Jupyter: The Jupyter project for interactive computing. Jupyter notebooks are commonly used as interactive Python environments. See also the project Jupyter homepage.
LAPACK: Linear-algebra package. See the Wikipedia entry.
LEED: Low energy electron diffraction
LEED-I(V): Energy-dependent low-energy electron diffraction.
MPI: Message-passing interface. See the Wikipedia entry.
mpifort: The MPI wrapper for gfortran. See the homepage.
mpiifort: The MPI wrapper for ifort.
TensErLEED: Erlangen package for tensor LEED. See also the paper by Blum and Heinz [6].
VASP: Vienna ab initio simulation package. See the VASP wiki.
VESTA: 3D Visualization software for structural models [12]. See also the VESTA homepage.
PyPI: The Python Package Index. See the PyPI homepage.
Python: The Python programming language. See the Python homepage.
UHV: Ultra-high vacuum
ViPErLEED: The Vienna Package for Erlangen LEED
viperleed.calc: The Python package of ViPErLEED that deals with calculations of LEED-I(V) curves.
WSL: Windows Subsystem for Linux. See also the page by Microsoft.
XRD: X-ray diffraction.