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Program Form_space

Usage

Form_space 'file' [-a] [-s] [-p=prime]
file: bravais_TYP containing the unimodular group G.

Description

Calculates a Z-basis for the space of matrices A with gtr * A * g = A for all g in G. Default: A is symmetric.

Options

-a:       all invariant matrices are calculated
-s:       only the skew-symmetric invariant matrices are calculated
-p=prime: the mod-p-invariant matrices, and a basis over Z/pZ is given.
          The default prime is  101.

Remarks

See also for Invar_space.

Examples

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