The n-linear indices can be computed taking into account all elements in the matrices of the algebraic forms [Keep All option (KA)]. However, can be calculated
considering some interactions through the use of cut-off:
- SRW: only the diagonal elements are considered.
- NSRW: only the off-diagonal elements are considered.
- Lag P/L: when this lag is applied, the matrix elements are different from zero for relations of atoms that have at less an atom-pair with
topological/geometrical distance, less or equal to a specified value.
See
Section 5 for mathematical definitions.