Torsion - calculation of torsion 2-forms

allows one to calculate torsion 2-forms.
  • id - variable - torsion identifier.
  • If a connection is calculated or defined, then the torsion can be calculated completely. Otherwise just the torsion identifier is declared as the torsion. To get the result of the calculation use iota operator.
  • The definition is as follows: , where ej are coframe 1-forms, are connection 1-forms, n is the dimension.