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isPositivelyOrientable -- whether a matroid is positively orientable

Usage:

isPositivelyOrientable M
Inputs:
- M, a matroid,
Outputs:
- a Boolean value, whether M is positively orientable

Description

This function determines whether a matroid is positively orientable, i.e. has a relabelling for which it is positively oriented.

i1 : M = matroid({{0,1},{2,3},{4,5}}, EntryMode => "circuits")

o1 = a "matroid" of rank 3 on 6 elements

o1 : Matroid

i2 : isPositivelyOrientable M

o2 = true

See also

isPositivelyOriented -- whether a matroid is positively oriented
positiveOrientation -- a positive orientation of a matroid

Ways to use isPositivelyOrientable:

isPositivelyOrientable(Matroid)

For the programmer

The object isPositivelyOrientable is a method function.

The source of this document is in Matroids/doc-Matroids.m2:2136:0.