# STABILITY

Performs wavefunction stability analysis. Called when specifically requested by the user.

## General

### CACHELEVEL

> - Type: integer
> - Default: 2

### FOLLOW

> Do follow the most negative eigenvalue of the Hessian towards a lower energy HF solution? Follow a UHF UHF instability of same symmetry?

> - Type: boolean
> - Default: false

### NUM_VECS_PRINT

> Number of lowest MO Hessian eigenvalues to print

> - Type: integer
> - Default: 0

### REFERENCE

> Reference wavefunction type

> - Type: string
> - Possible Values: RHF, UHF, ROHF
> - Default: RHF

### ROTATION_SCHEME

> Method for following eigenvectors, either 0 by angles or 1 by antisymmetric matrix.

> - Type: integer
> - Default: 0

### SCALE

> Scale factor (between 0 and 1) for orbital rotation step

> - Type: double
> - Default: 0.5