n><code><strong><a href="../../../../../../org/apache/commons/math3/linear/DiagonalMatrix.html#subtract(org.apache.commons.math3.linear.DiagonalMatrix)">subtract</a></strong>(<a href="../../../../../../org/apache/commons/math3/linear/DiagonalMatrix.html" title="class in org.apache.commons.math3.linear">DiagonalMatrix</a>&nbsp;m)</code>
<div class="block">Returns <code>this</code> minus <code>m</code>.</div>
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