Fix javadoc issues - had to use CSS to simulate nested <sup> tags
@@ -45,7 +45,7 @@ public class Erf {
/**
* Returns the error function.
*
- * <p>erf(x) = 2/&radic;&pi; <sub>0</sub>&int;<sup>x</sup> e<sup>-t<sup>2</sup></sup>dt </p>
+ * <p>erf(x) = 2/&radic;&pi; <sub>0</sub>&int;<sup>x</sup> e<sup>-t<span style="position: relative; top: -.5em">2</span></sup>dt </p>
*
* <p>This implementation computes erf(x) using the
* {@link Gamma#regularizedGammaP(double, double, double, int) regularized gamma function},
@@ -73,7 +73,7 @@ public class Erf {
/**
* Returns the complementary error function.
*
- * <p>erfc(x) = 2/&radic;&pi; <sub>x</sub>&int;<sup>&infin;</sup> e<sup>-t<sup>2</sup></sup>dt
+ * <p>erfc(x) = 2/&radic;&pi; <sub>x</sub>&int;<sup>&infin;</sup> e<sup>-t<span style="position: relative; top: -.5em">2</span></sup>dt
* <br>
* = 1 - {@link #erf(double) erf(x)} </p>
*
