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<a accesskey="3" href="page.php?w=Singular_matrix&amp;p=2">3.Next</a>
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<p>A <b>singular matrix</b> is a <a href="page.php?w=square_matrix">square matrix</a> that is not <a href="page.php?w=Invertible_matrix">invertible</a>, unlike non-singular matrices which are invertible. Equivalently, an -by- matrix  is singular if and only if <a href="page.php?w=determinant">determinant</a>, . In classical linear algebra, a matrix is called non-singular (or invertible) when it has an <a href="page.php?w=Inverse_function">inverse</a>; by definition, a matrix that fails this criterion is singular. In more algebraic terms, an -by-</p><p>
<a accesskey="3" href="page.php?w=Singular_matrix&amp;p=2">3.Next</a>
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