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# sc::Wavefunction Class Reference

A Wavefunction is a MolecularEnergy that utilizies a GaussianBasisSet. More...

`#include <wfn.h>`

Inheritance diagram for sc::Wavefunction:

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Collaboration diagram for sc::Wavefunction:

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List of all members.

## Public Methods

| Wavefunction (StateIn &)
| Wavefunction (const Ref< KeyVal > &)
| The KeyVal constructor. More...
virtual | ~Wavefunction ()
void | save_data_state (StateOut &)
| Save the base classes (with save_data_state) and the members in the same order that the StateIn CTOR initializes them. More...
double | density (const SCVector3 &)
double | density_gradient (const SCVector3 &, double *)
double | natural_orbital (const SCVector3 &r, int iorb)
double | natural_orbital_density (const SCVector3 &r, int orb, double *orbval=0)
double | orbital (const SCVector3 &r, int iorb, const RefSCMatrix &orbs)
double | orbital_density (const SCVector3 &r, int iorb, const RefSCMatrix &orbs, double *orbval=0)
double | charge ()
| Returns the charge.
virtual int | nelectron ()=0
| Returns the number of electrons.
virtual RefSymmSCMatrix | density ()=0
| Returns the SO density.
virtual RefSymmSCMatrix | ao_density ()
| Returns the AO density.
virtual RefSCMatrix | natural_orbitals ()
| Returns the natural orbitals.
virtual RefDiagSCMatrix | natural_density ()
| Returns the natural density (a diagonal matrix).
virtual int | spin_polarized ()=0
| Return 1 if the alpha density is not equal to the beta density.
virtual RefSymmSCMatrix | alpha_density ()
| Return alpha electron densities in the SO basis.
virtual RefSymmSCMatrix | beta_density ()
| Return beta electron densities in the SO basis.
virtual RefSymmSCMatrix | alpha_ao_density ()
| Return alpha electron densities in the AO basis.
virtual RefSymmSCMatrix | beta_ao_density ()
| Return beta electron densities in the AO basis.
virtual RefSCMatrix | nao (double *atom_charges=0)
| returns the ao to nao transformation matrix.
virtual RefSymmSCMatrix | overlap ()
| Returns the SO overlap matrix.
virtual RefSymmSCMatrix | core_hamiltonian ()
| Returns the SO core Hamiltonian.
RefSCDimension | ao_dimension ()
| Atomic orbital dimension.
RefSCDimension | so_dimension ()
| Symmetry adapted orbital dimension.
RefSCDimension | oso_dimension ()
| Orthogonalized symmetry adapted orbital dimension.
Ref< SCMatrixKit > | basis_matrixkit ()
| Matrix kit for AO, SO, orthogonalized SO, and MO dimensioned matrices.
Ref< GaussianBasisSet > | basis () const
| Returns the basis set.
Ref< Integral > | integral ()
| Returns the integral evaluator.
void | symmetry_changed ()
| Call this if you have changed the molecular symmetry of the molecule contained by this MolecularEnergy.
RefSCMatrix | so_to_orthog_so ()
| Returns a matrix which does the default transform from SO's to orthogonal SO's. More...
RefSCMatrix | so_to_orthog_so_inverse ()
| Returns the inverse of the transformation returned by so_to_orthog_so.
OverlapOrthog::OrthogMethod | orthog_method () const
| Returns the orthogonalization method.
double | lindep_tol () const
| Returns the tolerance for linear dependencies.
void | obsolete ()
| Marks all results as being out of date. More...
void | print (std::ostream &=ExEnv::out0()) const
| Print information about the object.

## Protected Methods

double | min_orthog_res ()
double | max_orthog_res ()
void | copy_orthog_info (const Ref< Wavefunction > &)

## Protected Attributes

int | debug_

## Detailed Description

A Wavefunction is a MolecularEnergy that utilizies a GaussianBasisSet.

## Constructor & Destructor Documentation

sc::Wavefunction::Wavefunction | ( | const Ref< KeyVal > & |  | ) |

The KeyVal constructor.

`basis`
  Specifies a GaussianBasisSet object. There is no default.

`integral`
  Specifies an Integral object that computes the two electron integrals. The default is a IntegralV3 object.

`orthog_method`
  This is a string that specifies the orthogonalization method to be used. It can be one one canonical, gramschmidt, or symmetric. The default is symmetric.

`lindep_tol`
  The tolerance used to detect linearly dependent basis functions. The precise meaning depends on the orthogonalization method. The default value is 1e-8.

`print_nao`
  This specifies a boolean value. If true the natural atomic orbitals will be printed. Not all wavefunction will be able to do this. The default is false.

`print_npa`
  This specifies a boolean value. If true the natural population analysis will be printed. Not all wavefunction will be able to do this. The default is true if print_nao is true, otherwise it is false.

`debug`
  This integer can be used to produce output for debugging. The default is 0.

## Member Function Documentation

void sc::Wavefunction::obsolete | ( |  | ) | `[virtual]`

| Marks all results as being out of date. Any subsequent access to results will cause Compute::compute() to be called. Reimplemented from sc::Compute. Reimplemented in sc::MBPT2.

void sc::Wavefunction::save_data_state | ( | StateOut & |  | ) | `[virtual]`

| Save the base classes (with save_data_state) and the members in the same order that the StateIn CTOR initializes them. This must be implemented by the derived class if the class has data. Reimplemented from sc::MolecularEnergy. Reimplemented in sc::MBPT2.

RefSCMatrix sc::Wavefunction::so_to_orthog_so | ( |  | ) |

| Returns a matrix which does the default transform from SO's to orthogonal SO's. This could be either the symmetric or canonical orthogonalization matrix. The row dimension is SO and the column dimension is ortho SO. An operator in the ortho SO basis is given by where is the return value of this function.

The documentation for this class was generated from the following file:

- wfn.h