isPositivelyOriented -- whether a matroid is positively oriented

• Usage:

  isPositivelyOriented M

• Inputs:
  • M, a matroid,
• Outputs:
  • a Boolean value, whether M 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 : isPositivelyOriented M

o2 = false