Logarithmic solution from a repeated Frobenius exponent
= Logarithmic solution from a repeated Frobenius exponent
= Logarithmic Frobenius solution
{c}
{synonym}
When a second-order equation has a repeated indicial root and only one independent Frobenius series, a second solution has the local form
$$
y_2(z)=y_1(z)\log(z-z_0)+\text{a Frobenius series}.
$$