---
name: "sc_PsiCCSD"
section: "3"
platform: "linux"
package: "libsc-doc"
version: "2.3.1-22"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/sc_PsiCCSD"
---

# sc\_PsiCCSD(3)

PsiCCSD is a concrete implementation of Psi CCSD wave function.

## NAME

sc::PsiCCSD - **PsiCCSD** is a concrete implementation of Psi CCSD wave function.

## SYNOPSIS

`#include <psiwfn.h>`

Inherits **sc::PsiWavefunction**.

### Public Member Functions

**PsiCCSD** (const **Ref**\< **KeyVal** \> &)\
 **PsiCCSD** (**StateIn** &)\
 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.  int **spin\_polarized** ()\
 Return 1 if the alpha density is not equal to the beta density.  int **gradient\_implemented** () const\

### Protected Member Functions

void **write\_input** (int conv)\
 Prepares a complete Psi input file. The input file is assumed to have been opened.

### Additional Inherited Members

## Detailed Description

**PsiCCSD** is a concrete implementation of Psi CCSD wave function.

## Member Function Documentation

### int sc::PsiCCSD::gradient\_implemented () const` [virtual]`

Reimplemented from **sc::Function**.

### void sc::PsiCCSD::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::PsiWavefunction**.

### int sc::PsiCCSD::spin\_polarized ()` [inline]`, ` [virtual]`

Return 1 if the alpha density is not equal to the beta density.

Implements **sc::Wavefunction**.

### void sc::PsiCCSD::write\_input (int conv)` [protected]`, ` [virtual]`

Prepares a complete Psi input file. The input file is assumed to have been opened.

Implements **sc::PsiWavefunction**.

## Author

Generated automatically by Doxygen for MPQC from the source code.