# compute_ext_rays man page

compute_ext_rays — compute extreme rays of a tropical cone

## Description

Computes the extreme rays of a tropical cone given by a system of tropically affine inequalities.

## Arguments

**-numerical-data**- Set the type of numerical data used by the algorithm, one of: ocaml_int, ocaml_float, ocaml_big_int, ocaml_big_rat, zarith_int, and zarith_rat.
**-min-plus**- Use the min-plus semiring instead of the default max-plus semiring.
**-no-ordering**- The constraints are not dynamically ordered during the execution.
**-polymake-output**- Output under polymake format. Takes an argument, corresponding to a list c_1,...,c_p of coordinates on which the result is projected.
**-bounding-box**- Set a bounding box, specified as a list (separated by commas) of triples (c:l:u), where c is the index of a coordinate, and l and u are lower and upper bounds (
**-infinity**/**+infinity**are allowed). **-help**,**--help**- Display this list of options.

## See Also

compute_ext_rays_polar(1), compute_halfspaces(1), compute_minimal_external_representations(1), compute_tangent_hypergraph(1), compute_tropical_complex(1)

## Referenced By

compute_ext_rays_polar(1), compute_halfspaces(1), compute_minimal_external_representations(1), compute_tangent_hypergraph(1), compute_tropical_complex(1).

Feb 2013 TPLib 1.3 User Commands