CARAT Introduction / Programs / Signature

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## Program Signature

### Usage

    Signature 'file' [-t]

file: matrix_TYP containing a set of symmetric matrices

### Description

Calculates the signature (Sylvester type) of the matrices in file. For a matrix congruent to diag(1,...,1,-1,...,-1,0,...0) over the reals it returns the appropriate number of 1's, -1's, and 0's.

### Options

    -t:   it decides only which matrices are positive or negative (semi-)definite.

### Examples

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