# Overview

CYTools provides six main Python classes containing various functions specific to the object they describe. These classes are the following:

• Polytope This class handles all computations relating to lattice polytopes, such as the computation of lattice points and faces. When using reflexive polytopes, it also allows the computation of topological properties of the arising Calabi-Yau hypersurfaces that only depend on the polytope.

• PolytopeFace This class handles all computations relating to faces of lattice polytopes.

• Triangulation This class handles triangulations of lattice polytopes. It can compute various properties of the triangulation, as well as construct a ToricVariety or CalabiYau object if the triangulation is suitable.

• ToricVariety This class handles various computations relating to toric varieties. It can be used to compute intersection numbers and the Kähler cone, among other things.

• CalabiYau This class handles various computations relating to the Calabi-Yau manifold itself. It can be used to compute intersection numbers and the toric Mori and Kähler cones, among other things.

• Cone This class handles all computations relating to rational polyhedral cones, such cone duality and extremal ray computations. It is mainly used for the study of Kähler and Mori cones.

Apart from the above classes there are other miscellaneous functions that we document in the misc functions page. There are also a few configuration options that can be found in the configuration page, and some experimental features documented in the experimental features page.