-- -*- M2-comint -*- hash: 17155826952594961362

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

i3 : p = positiveOrientation M

o3 = {0, 5, 1, 4, 2, 3}

o3 : List

i4 : N = relabel(M, p)

o4 = a "matroid" of rank 3 on 6 elements

o4 : Matroid

i5 : isPositivelyOriented N

o5 = true

i6 : 
