nullity

The state of being null, or void, or invalid.

Noun

  1. The state of being null, or void, or invalid.
    • nullity of marriage
  2. A void act; a defective proceeding or one expressly declared by statute to be a nullity.
  3. The dimension of the kernel of a linear transformation; the dimension of the nullspace of a matrix.

Origin

From Middle French nullité and its etymon Medieval Latin nūllitās, from Latin nūllus. By surface analysis, null + -ity.

Forms

nullities

Derived

rank-nullity theorem