Cayron, C.2014-11-142014-11-142014-11-14200710.1107/S0021889807048741https://infoscience.epfl.ch/handle/20.500.14299/108862A computer program called GenOVa, written in Python, calculates the orientational variants, the operators (special types of misorientations between variants) and the composition table associated with a groupoid structure. The variants can be represented by three-dimensional shapes or by pole figures. © International Union of Crystallography 2007.Computer programsGenOVaGroupoidsOrientationPole figuresSimulationsVariantstext::journal::journal article::research article