CARAT Introduction / Programs / Rform
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Program Rform

Usage

Rform 'file1' ['file2'] [-e=epsilon]
file1: bravais_TYP of the finite unimodular group G.
file2: (OPTIONAL) matrix_TYP of a single matrix A. If file2 is not given, A=In the identity matrix is assumed.

Description

The program calculates the sum of gtrAg with g in G in a seminumerical way, and divides the results by the greatest common divisor of it's entries.
Note that this gives a way to construct a positive definite, G-invariant matrix.

Options

-e=epsilon : epsilon is a control parameter, controlling the accuracy
             of the convergence. It is given as an integer epsilon >= 100, and
             bigger value stand for a more accurate  convergence.

Remarks

See also for Invar_space.

Examples

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