%0 Journal Article %A Castellanos PeƱuela, Julio Antonio %T Hamburger-Noether matrices over rings %D 1990 %@ 0022-4049 %U https://hdl.handle.net/20.500.14352/58376 %X We study Hamburger-Noether matrices over rings, obtaining some applications to deformations of curves and equisingularity. We also study a special type of them, the matrices of Arf. %~