d9d0f37b045266a270de161487">m_alpha</a> = 1.0d-4</td></tr>
<tr class="memdesc:a100660d9d0f37b045266a270de161487"><td class="mdescLeft">&#160;</td><td class="mdescRight">Defines the scaling of the product of the gradient and direction vectors such that F(X + LAMBDA * P) &lt;= F(X) + LAMBDA * ALPHA * P**T * G, where P is the search direction vector, G is the gradient vector, and LAMBDA is the scaling factor. The parameter must exist on the set (0, 1). A value of 1e-4 is typically a good starting point. <br />