Nullity

Nullity may refer to:

• Legal nullity, something without legal significance
• Nullity (conflict), a legal declaration that no marriage had ever come into being

Mathematics

• Nullity (linear algebra), the dimension of the kernel of a mathematical operator or null space of a matrix
• Nullity (graph theory), the nullity of the adjacency matrix of a graph
• Nullity, the difference between the size and rank of a subset in a matroid
• Nullity, a concept in transreal arithmetic denoted by Φ, or similarly in wheel theory denoted by ⊥.

See also

• Null
• Nullification