minss minimal realization

## Syntax

                slc = minss(sl)
                slc = minss(sl, tol)

## Arguments

sl,slc

  `syslin` lists (linear systems in state-space form)

tol

  real (threshold for rank determination (see `contr`))

## Description

`minss` returns in `slc` a minimal realization of `sl`.

## Examples

    sl=syslin('c',[1 0;0 2],[1;0],[2 1]);
    ssprint(sl);
    ssprint(minss(sl))

## See also

- contr
- minreal
- arhnk
- contrss
- obsvss
- balreal