Find the Wronskian of a set of solutions $\displaystyle {\left\lbrace{y}_{{1}},{y}_{{2}}\right\rbrace}$ of the Legendre's equation

$\displaystyle {\left({1}-{x}^{{2}}\right)}{y}{''}-{2}{x}{y}'+\alpha{\left(\alpha+{1}\right)}{y}={0}$

given that $\displaystyle {W}{\left({0}\right)}={1}$.

Hint: Use Abel's Formula