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Install

Install this package:

emerge -a sci-mathematics/gfan

If the package is masked, you can unmask it using the autounmask tool or standard emerge options:

autounmask sci-mathematics/gfan

Or alternatively:

emerge --autounmask-write -a sci-mathematics/gfan

Package Information

Description:

Gfan is a software package for computing Gröbner fans and tropical varieties. These are polyhedral fans associated to polynomial ideals. The maximal cones of a Gröbner fan are in bijection with the marked reduced Gröbner bases of its defining ideal. The software computes all marked reduced Gröbner bases of an ideal. Their union is a universal Gröbner basis. The tropical variety of a polynomial ideal is a certain subcomplex of the Gröbner fan. Gfan contains algorithms for computing this complex for general ideals and specialized algorithms for tropical curves, tropical hypersurfaces and tropical varieties of prime ideals. In addition to the above core functions the package contains many tools which are useful in the study of Gröbner bases, initial ideals and tropical geometry. The full list of commands can be found in Appendix B of the manual. For ordinary Gröbner basis computations Gfan is not competitive in speed compared to programs such as CoCoA, Singular and Macaulay2.

Homepage:

https://users-math.au.dk/~jensen/software/gfan/gfan.html

License:

GPL-2+

Versions

Metadata

Description

• Gfan is a software package for computing Gröbner fans and tropical varieties. These are polyhedral fans associated to polynomial ideals. The maximal cones of a Gröbner fan are in bijection with the marked reduced Gröbner bases of its defining ideal. The software computes all marked reduced Gröbner bases of an ideal. Their union is a universal Gröbner basis. The tropical variety of a polynomial ideal is a certain subcomplex of the Gröbner fan. Gfan contains algorithms for computing this complex for general ideals and specialized algorithms for tropical curves, tropical hypersurfaces and tropical varieties of prime ideals. In addition to the above core functions the package contains many tools which are useful in the study of Gröbner bases, initial ideals and tropical geometry. The full list of commands can be found in Appendix B of the manual. For ordinary Gröbner basis computations Gfan is not competitive in speed compared to programs such as CoCoA, Singular and Macaulay2.

Maintainers

• Gentoo Mathematics Project (sci-mathematics@gentoo.org) - Type: project

<pkgmetadata>
	<maintainer type="project">
		<email>sci-mathematics@gentoo.org</email>
		<name>Gentoo Mathematics Project</name>
	</maintainer>
	<longdescription lang="en">
  Gfan is a software package for computing Gröbner fans and tropical
  varieties. These are polyhedral fans associated to polynomial
  ideals. The maximal cones of a Gröbner fan are in bijection with the
  marked reduced Gröbner bases of its defining ideal. The software
  computes all marked reduced Gröbner bases of an ideal. Their union
  is a universal Gröbner basis. The tropical variety of a polynomial
  ideal is a certain subcomplex of the Gröbner fan. Gfan contains
  algorithms for computing this complex for general ideals and
  specialized algorithms for tropical curves, tropical hypersurfaces
  and tropical varieties of prime ideals. In addition to the above
  core functions the package contains many tools which are useful in
  the study of Gröbner bases, initial ideals and tropical
  geometry. The full list of commands can be found in Appendix B of
  the manual. For ordinary Gröbner basis computations Gfan is not
  competitive in speed compared to programs such as CoCoA, Singular
  and Macaulay2.
</longdescription>
</pkgmetadata>

Lint Warnings

• [Warning] USE flag 'doc' in ebuild 0.6.2-r8 is not documented in metadata.xml
• [Warning] USE flag 'doc' in ebuild 0.6.2-r7 is not documented in metadata.xml
• [Error] Missing md5-cache for ebuild gfan-0.6.2-r8
• [Error] Missing md5-cache for ebuild gfan-0.6.2-r7

USE Flags

Manage flags for this package: euse -i <flag> -p sci-mathematics/gfan | euse -E <flag> -p sci-mathematics/gfan | euse -D <flag> -p sci-mathematics/gfan

Files

• gfan-0.6.2-Makefile.patch
• gfan-0.6.2-find-name.patch
• gfan-0.6.2-fix-0602ResultantFanProjection.patch
• gfan-0.6.2-fix-spelling-errors.patch
• gfan-0.6.2-gcc15.patch
• gfan-0.6.2-glibcxx-assertions.patch
• gfan-0.6.2-testsuite.patch

Manifest