Şahin, M.Şahin, Nil2020-02-102020-02-1020190004-9727http://hdl.handle.net/11693/53236We compute Betti numbers for a Cohen–Macaulay tangent cone of a monomial curve in the affine 4-space corresponding to a pseudo-symmetric numerical semigroup. As a byproduct, we also show that for these semigroups, being of homogeneous type and homogeneous are equivalent properties.EnglishNumerical semigroup ringsMonomial curvesTangent conesBetti numbersFree resolutionsArticle10.1017/S0004972718000898