Maxima Function
union (a_1, ..., a_n)
Returns the union of the sets a_1 through a_n.
union()
(with no arguments) returns the empty set.
union
complains if any argument is not a literal set.
Examples:
(%i1) S_1 : {a, b, c + d, %e}; (%o1) {%e, a, b, d + c} (%i2) S_2 : {%pi, %i, %e, c + d}; (%o2) {%e, %i, %pi, d + c} (%i3) S_3 : {17, 29, 1729, %pi, %i}; (%o3) {17, 29, 1729, %i, %pi} (%i4) union (); (%o4) {} (%i5) union (S_1); (%o5) {%e, a, b, d + c} (%i6) union (S_1, S_2); (%o6) {%e, %i, %pi, a, b, d + c} (%i7) union (S_1, S_2, S_3); (%o7) {17, 29, 1729, %e, %i, %pi, a, b, d + c} (%i8) union ({}, S_1, S_2, S_3); (%o8) {17, 29, 1729, %e, %i, %pi, a, b, d + c}