Improvements to SLEPc in Releases 3.14–3.18

This short paper describes the main new features added to SLEPc, Scalable Library for Eigenvalue Problem Computations, in last two and a half years, corresponding five release versions. The novelty is extension of SVD module with problem types such as generalized or hyperbolic SVD. Additionally, many improvements have been incorporated different parts library, including contour integral eigensolvers, preconditioning GPU support.