principia_materia.representation.direct_product module

class principia_materia.representation.direct_product.DirectProduct(pg, irrep_inputs, tol=1e-06)

Bases: BaseRepresentation

Compute direct product representation of irreducible representations of a point group

Parameters:

  • pg (str or PointGroup object) – The point group

  • irrep_inputs (list of str or tuple) – A list of irreducible representations to compute direct product with. Must be types supported by parser get_irrep_name.

  • tol (float, optional, default to 1.0E-6) – Error tolerence.

property irrep_matr
principia_materia.representation.direct_product.get_irrep_name(ir)

Find name of irreducible representation from input

Parameters:

ir (tuple or str) –

Irreducible representation. Following types are supported:

  1. tuple type: (<irrep name>, <irrep instance>)

  2. irrep name in str type

  3. str type: “<irrep name>[<irrep instance>]”