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<p>see <a href="page.php?w=Solution_in_radicals">Solution in radicals</a>.</p>

<p><big>Zero set</big></p>
<p>In various areas of mathematics, the <b>zero set</b> of a <a href="page.php?w=function_%28mathematics%29">function</a> is the set of all its zeros. More precisely, if  is a <a href="page.php?w=real-valued_function">real-valued function</a> (or, more generally, a function taking values in some <a href="page.php?w=Abelian_group">additive group</a>), its zero set is , the <a href="page.php?w=inverse_image">inverse image</a> of  in . </p>

<p>Under the</p><p>
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