-- -*- M2-comint -*- hash: 6398324637666292359

i1 : M = matroid({a,b,c,d},{{a,b},{a,c}})

o1 = a "matroid" of rank 2 on 4 elements

o1 : Matroid

i2 : isDependent(M, {a,b})

o2 = false

i3 : isDependent(M, {d})

o3 = true

i4 : 
