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<p>the <a href="page.php?w=electron_hole">electron hole</a>; a fairly general theoretical description is provided by the <a href="page.php?w=Dirac_sea">Dirac sea</a>, which treats <a href="page.php?w=positron">positron</a>s (or <a href="page.php?w=anti-particle">anti-particle</a>s in general) as holes. Holes provide one of the two primary forms of conduction in a <a href="page.php?w=semi-conductor">semi-conductor</a>, that is, the material from which <a href="page.php?w=transistor">transistor</a>s are made; without holes, current could not flow,</p><p>
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