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isNonCrossing -- whether 2 subsets are non-crossing

Usage:

isNonCrossing(A, B)
Inputs:
- A, a list,
- B, a list,
Outputs:
- a Boolean value, whether A and B are non-crossing subsets of [n]

Description

This function determines whether two disjoint subsets of [n] are non-crossing.

i1 : isNonCrossing({0,1,7},{2,4,5})

o1 = true

i2 : isNonCrossing({2,3,6},{1,4})

o2 = false

See also

isPositivelyOriented -- whether a matroid is positively oriented

Ways to use isNonCrossing:

isNonCrossing(List,List)
isNonCrossing(Set,Set)

For the programmer

The object isNonCrossing is a method function.

The source of this document is in Matroids/doc-Matroids.m2:2048:0.