title: Necessity of Hessian Matrix
body: <p>Hessian Matrix helps determine the saddle points, and the <strong>local extremum</strong> of a function.</p>
  <p>Source: <a href="https://machinelearningmastery.com/a-gentle-introduction-to-hessian-matrices/" rel="nofollow noreferrer">https://machinelearningmastery.com/a-gentle-introduction-to-hessian-matrices/</a></p>
  <p>Hessian Matrix is used in Newton methods to optimize functions. Of what use is a Hessian Matrix in optimization when it cannot give global minima (which is what we look for when optimizing functions)?</p>