---
name: "sc_VWN1LCFunctional"
section: "3"
platform: "linux"
package: "libsc-doc"
version: "2.3.1-22"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/sc_VWN1LCFunctional"
---

# sc\_VWN1LCFunctional(3)

The VWN1LCFunctional computes energies and densities using the VWN1 local correlation term (from Vosko, Wilk, and Nusair).

## NAME

sc::VWN1LCFunctional - The **VWN1LCFunctional** computes energies and densities using the VWN1 local correlation term (from Vosko, Wilk, and Nusair).

## SYNOPSIS

`#include <functional.h>`

Inherits **sc::VWNLCFunctional**.

### Public Member Functions

**VWN1LCFunctional** ()\
 Construct a VWN1 functional using Monte-Carlo parameters.  **VWN1LCFunctional** (int use\_rpa)\
 Construct a VWN1 functional using the RPA parameters.  **VWN1LCFunctional** (const **Ref**\< **KeyVal** \> &)\
 Construct a VWN1 functional using the Monte-Carlo parameters by default.  **VWN1LCFunctional** (**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.  void **point\_lc** (const **PointInputData** &, **PointOutputData** &, double &, double &, double &)\

### Protected Attributes

double **x0p\_**\
 double **bp\_**\
 double **cp\_**\
 double **x0f\_**\
 double **bf\_**\
 double **cf\_**\

### Additional Inherited Members

## Detailed Description

The **VWN1LCFunctional** computes energies and densities using the VWN1 local correlation term (from Vosko, Wilk, and Nusair).

## Constructor & Destructor Documentation

### sc::VWN1LCFunctional::VWN1LCFunctional (const Ref\< KeyVal \> &)

Construct a VWN1 functional using the Monte-Carlo parameters by default. If rpa is set to true, then load the RPA paramenters. Furthermore, each value can be overridden by assigning to x0p, bp, cp, x0f, bf, and/or cf.

## Member Function Documentation

### void sc::VWN1LCFunctional::point\_lc (const PointInputData &, PointOutputData &, double &, double &, double &)` [virtual]`

Reimplemented from **sc::VWNLCFunctional**.

### void sc::VWN1LCFunctional::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::VWNLCFunctional**.

## Author

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