Thank you for your reply however, I wanted to solve a generalized eigenvalue problem (also known as the generalized eigenpair problem), which involves finding eigenvalues and eigenvectors for a pair of matrices A and B, such that:
A⋅x=λ⋅B⋅x
Where A and B are square matrices, λ are the eigenvalues, and x are the corresponding eigenvectors (in general dgeev is used for this purpose).