Eqs. (78): the left side of the equality must be multiplied by 4<br>Page 224, first line: $\Omega (x_e)=(L-\sqrt{\alpha^2-1/4})/2$<br>Page 224, line 8 of Theorem 7: replace $\alpha=-1/2$ by $|\alpha|=1/2$ (because $\alpha=-1/2$ corresponds to even degree and $\alpha=1/2$ to odd degree)<br><br><span style="font-family: Symbol;"></span><br>