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<a accesskey="3" href="page.php?w=semi-differentiability&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=calculus">calculus</a>, the notions of <b>one-sided differentiability</b> and <b>semi-differentiability</b> of a <a href="page.php?w=real_number">real</a>-valued <a href="page.php?w=function_%28mathematics%29">function</a> f of a real variable are weaker than <a href="page.php?w=differentiability">differentiability</a>. Specifically, the function f is said to be <b>right differentiable</b> at a point a if, roughly speaking, a <a href="page.php?w=derivative_%28mathematics%29">derivative</a> can be defined as the function's</p><p>
<a accesskey="3" href="page.php?w=semi-differentiability&amp;p=2">3.Next</a>
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