Spectral parameter power series for arbitrary order linear differential equations

Vladislav V. Kravchenko, R. Michael Porter, Sergii M. Torba

Let $L$ be the $n$-th order linear differential operator $Ly={\varphi }_0{y}^{(n)}+{\varphi }_1{y}^{(n-1)}+\cdots +{\varphi }_{n}y$ with variable coefficients. A representation is given for $n$ linearly ind…