In linear algebra, nullity is the dimension of the solution space of a homogeneous system.

First you use the Jordan-Gauss method to reduce the equation.

The nullity is the number of columns minus the number of non-zero rows.

Nul"li*ty (?), n.; pl. Nullities. [LL. nullitias, fr. L. nullus none: cf. F. nullit'e . See Null.]

1.

The quality or state of being null; nothingness; want of efficacy or force.

2. Law

Nonexistence; as, a decree of nullity of marriage is a decree that no legal marriage exists.

3.

That which is null.

Was it not absurd to say that the convention was supreme in the state, and yet a nullity ? Macaulay.

 

© Webster 1913.

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