# sc_CorrelationTable man page

sc::CorrelationTable — The **CorrelationTable** class provides a correlation table between two point groups.

## Synopsis

`#include <corrtab.h>`

Inherits **sc::RefCount**.

### Public Member Functions

**CorrelationTable** (const **Ref**< **PointGroup** > &**group**, const **Ref**< **PointGroup** > &**subgroup**)

Create a correlation table for the two groups. **Ref**< **PointGroup** > **group** () const

Returns the higher order point group. **Ref**< **PointGroup** > **subgroup** () const

Returns the lower order point group.

int **initialize_table** (const **Ref**< **PointGroup** > &**group**, const **Ref**< **PointGroup** > &**subgroup**)

Initalize the correlation table.

const char * **error** (int errcod)

Converts error codes from initialize_table into a text string.

int **n** () const

Returns the number of irreps in the high order group.

int **subn** () const

Returns the number of irreps in the subgroup.

int **degen** (int igamma) const

Returns the degeneracy of the irrep.

int **subdegen** (int igamma) const

Returns the degeneracy of the subgroup irrep.

int **ngamma** (int igamma) const

Returns the number of irreps in the low order group that an irrep.

int **gamma** (int igamma, int i) const

Returns the irreps in the low order group that an irrep from the high order group can be reduced to.

void **print** (std::ostream &o=**ExEnv::out0**()) const

### Additional Inherited Members

## Detailed Description

The **CorrelationTable** class provides a correlation table between two point groups.

## Member Function Documentation

### int sc::CorrelationTable::gamma (int igamma, int i) const [inline]

Returns the irreps in the low order group that an irrep from the high order group can be reduced to.

References sc::ExEnv::out0().

### int sc::CorrelationTable::initialize_table (const Ref< PointGroup > & group, const Ref< PointGroup > & subgroup)

Initalize the correlation table. Returns 0 for success and nonzero for failure. This will fail if the subgroup is not really a subgroup of group.

Referenced by subgroup().

## Author

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