nullity
nounEtymology From Middle French nullité and its etymon Medieval Latin nūllitās, from Latin nūllus. By surface analysis, null + -ity.
1
The state of being null, or void, or invalid.
- nullity of marriage
2
Law A void act; a defective proceeding or one expressly declared by statute to be a nullity.
3
Mathematics, Sciences The dimension of the kernel of a linear transformation; the dimension of the nullspace of a matrix.
- Derived terms
- rank-nullity theorem