∧
X∧Y gives LCM; on Booleans, AND. Pervasive.
X∧Y
0 0 1 1∧0 1 0 1 ⍝ 0 0 0 1 4x∧6x ⍝ 12x ∧/1 1 0 ⍝ 0
Includes rational and complex LCM. Inputs are finite. Empty reduction identity: one.