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<p>means of both regularization and Bayesian methods. </p>

<p><big>An elementary example: Earth's gravitational field</big></p>
<p>Only a few physical systems are actually linear with respect to the model parameters. One such system from geophysics is that of the <a href="page.php?w=Gravity_of_Earth">Earth's gravitational field</a>. The Earth's gravitational field is determined by the density distribution of the Earth in the subsurface. Because the <a href="page.php?w=lithology">lithology</a> of the Earth changes quite significantly, we are able to observe</p><p>
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