N-body operators

NBodyOperator{N}

Abstract N-body operator coupling N bodies each between two Slater determinants

LinearCombinationOperator(operators)

Represents a linear combination of NBodyOperators.

IdentityOperator{N}

The N-body identity operator. Leaves the orbital(s) acted upon unchanged.

ContractedOperator(a, o, b)

An NBodyOperator representing the contraction of the operator o over the orbital sets a and b. The lengths of a and b have to equal, and they cannot exceed the dimension of o.

in(orbital, co::ContractedOperator)

Test if orbital is among the right set of orbitals of the ContractedOperator co. Useful to test if co is an integral operator with respect to orbital.

in(corbital::Conjugate, co::ContractedOperator)

Test if corbital is among the left set of orbitals of the ContractedOperator co. Useful to test if co is an integral operator with respect to corbital.

contract(orbital_matrix_element, i...)

Contract the orbital_matrix_element over all coordinates i....

contract(ome::OrbitalMatrixElement{N}, i...)

Contract ome over all coordinates i.... length(i) cannot be larger than N.

complement(N, i...)

Generate the complement to i... in the set 1:N. Useful for contracting OrbitalMatrixElements over all coordinates except i....