x - y
i1 : set{a,b,c} - set{a} o1 = set {c, b} o1 : Set
i2 : set{a,b,c} - {a} o2 = set {c, b} o2 : Set
i3 : {a,b,c} - set{a} o3 = {b, c} o3 : List
The source of this document is in Macaulay2Doc/functions/set-doc.m2:128:0.