Abstract

In this paper we study monomial ideals and ladder determinantal ideals of linear type and their blow-up algebras. Our main tools are Grobner bases and Sagbi bases deformations and the notion of M-sequence of monomials. w x Let R s K X be a polynomial ring over a field K equipped with a monomial order t . Let I be an ideal of R generated by polynomials f , . . . , f . Consider the presentation 1 s w x w x w x c : R T s R T , . . . , T a R I s R f t , . . . , f t Ž . 1 s i s

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