👉 Unfacil is a term used in mathematics, specifically in the field of algebraic geometry. It refers to an algebraic variety that has no rational points or singularities. In algebraic geometry, an algebraic variety is defined as a set of points in a polynomial ring over a field. An algebraic variety without rational points means that any two distinct points have at least one common rational line. This condition is known as the Zariski topology on the variety. The term "unfac