An eigenvalue problem involving a degenerate and singular elliptic   operator
  We study an eigenvalue problem involving a degenerate and singular elliptic operator on the whole space $\mathbb{R}^N$. We prove the existence of an unbounded and increasing sequence of eigenvalues. Our study generalizes to the case of degenerate and singular operators a result of A. Szulkin and M. Willem. 
Mihai Mih\u{a}ilescu, Du\v{s}an Repov\v{s}
math.AP