Hi,
the following latex code produces a black stripe as shown in figure.
\[
k_v=\min\begin{cases}
1 \\
\frac{k_{n}(1+\frac{1,1i^{1,5}}{\sqrt{h}})}{\sqrt{h}(\sqrt{\alpha(1-\alpha)}+0,8\frac{x}{h}\sqrt{\frac{1}{\alpha}-\alpha^{2}})}
\\
\end{cases}
\]
http://www.iperspace.it/main121x.png
How can I fix this?
Thanks in advance.
Regards
-j