---
name: "sc_TwoBodyThreeCenterIntV3"
section: "3"
platform: "linux"
package: "libsc-doc"
version: "2.3.1-22"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/sc_TwoBodyThreeCenterIntV3"
---

# sc\_TwoBodyThreeCenterIntV3(3)

This implements electron repulsion integrals involving three centers in the IntV3 library.

## NAME

sc::TwoBodyThreeCenterIntV3 - This implements electron repulsion integrals involving three centers in the IntV3 library.

## SYNOPSIS

`#include <tbintv3.h>`

Inherits **sc::TwoBodyThreeCenterInt**.

### Public Member Functions

**TwoBodyThreeCenterIntV3** (**Integral** \***integral**, const **Ref**\< **GaussianBasisSet** \> &b1, const **Ref**\< **GaussianBasisSet** \> &b2, const **Ref**\< **GaussianBasisSet** \> &b3, size\_t storage)\
 int **log2\_shell\_bound** (int, int, int)\
 Return log base 2 of the maximum magnitude of any integral in a shell block obtained from compute\_shell.  void **compute\_shell** (int, int, int)\
 Given three shell indices, integrals will be computed and placed in the buffer.  size\_t **storage\_used** ()\
 void **set\_integral\_storage** (size\_t storage)\
 This storage is used to cache computed integrals.

### Protected Attributes

**Ref**\< **Int2eV3** \> **int2ev3\_**\

### Additional Inherited Members

## Detailed Description

This implements electron repulsion integrals involving three centers in the IntV3 library.

## Member Function Documentation

### void sc::TwoBodyThreeCenterIntV3::compute\_shell (int, int, int)` [virtual]`

Given three shell indices, integrals will be computed and placed in the buffer. The first two indices correspond to electron 1 and the second index corresponds to electron 2.

Implements **sc::TwoBodyThreeCenterInt**.

### int sc::TwoBodyThreeCenterIntV3::log2\_shell\_bound (int, int, int)` [virtual]`

Return log base 2 of the maximum magnitude of any integral in a shell block obtained from compute\_shell. An index of -1 for any argument indicates any shell. \

Implements **sc::TwoBodyThreeCenterInt**.

### void sc::TwoBodyThreeCenterIntV3::set\_integral\_storage (size\_t storage)` [virtual]`

This storage is used to cache computed integrals.

Reimplemented from **sc::TwoBodyThreeCenterInt**.

## Author

Generated automatically by Doxygen for MPQC from the source code.