When are multidegrees positive?
Let k be an arbitrary field, P= P km 1× k⋯× k P kmp be a multiprojective space over k, and
X⊆ P be a closed subscheme of P. We provide necessary and sufficient conditions for the …
X⊆ P be a closed subscheme of P. We provide necessary and sufficient conditions for the …
Mixed multiplicities and projective degrees of rational maps
Y Cid-Ruiz - Journal of Algebra, 2021 - Elsevier
We consider the notion of mixed multiplicities for multigraded modules by using Hilbert
series, and this is later applied to study the projective degrees of rational maps. We use a …
series, and this is later applied to study the projective degrees of rational maps. We use a …
Multidegrees, prime ideals, and non-standard gradings
A Caminata, Y Cid-Ruiz, A Conca - Advances in Mathematics, 2023 - Elsevier
We study several properties of multihomogeneous prime ideals. We show that the
multigraded generic initial ideal of a prime has very special properties, for instance, its …
multigraded generic initial ideal of a prime has very special properties, for instance, its …
Mixed multiplicities of ideals versus mixed volumes of polytopes
The main results of this paper interpret mixed volumes of lattice polytopes as mixed
multiplicities of ideals and mixed multiplicities of ideals as Samuel's multiplicities. In …
multiplicities of ideals and mixed multiplicities of ideals as Samuel's multiplicities. In …
Positivity of mixed multiplicities
NV Trung - arXiv preprint math/0211180, 2002 - arxiv.org
This paper studies mixed multiplicities of an arbitrary standard bigraded algebra and mixed
multiplicities of two ideals I, J in a local ring (A, m), where I is an m-primary ideal and J an …
multiplicities of two ideals I, J in a local ring (A, m), where I is an m-primary ideal and J an …
The diagonal subalgebra of a blow-up algebra
A Simis, NV Trung, G Valla - Journal of Pure and Applied Algebra, 1998 - Elsevier
Given a bigradedk-algebraS=⊕(u, ν) S (u, ν),(u, ν) εℕ× ℕ,(ka field), one attaches to it the so-
called diagonal subalgebraSδ=⊕(u, u) S (u, u). This notion generalizes the concept of …
called diagonal subalgebraSδ=⊕(u, u) S (u, u). This notion generalizes the concept of …
[HTML][HTML] The border of the Hilbert function of a set of points in Pn1×⋯× Pnk
A Van Tuyl - Journal of Pure and Applied Algebra, 2002 - Elsevier
We describe the eventual behaviour of the Hilbert function of a set of distinct points in P
n1×⋯× P nk. As a consequence of this result, we show that the Hilbert function of a set of …
n1×⋯× P nk. As a consequence of this result, we show that the Hilbert function of a set of …
Hilbert functions of multigraded algebras, mixed multi-plicities of ideals and their applications
This paper is a survey on major results on Hilbert functions of multigraded algebras and
mixed multiplicities of ideals, including their applications to the computation of Milnor …
mixed multiplicities of ideals, including their applications to the computation of Milnor …
Growth of sumsets in abelian semigroups
MB Nathanson - arXiv preprint math/0002091, 2000 - arxiv.org
Let S be an abelian semigroup, written additively. Let A be a finite subset of S. We denote
the cardinality of A by| A|. For any positive integer h, the sumset hA is the set of all sums of h …
the cardinality of A by| A|. For any positive integer h, the sumset hA is the set of all sums of h …
Hilbert polynomials of non-standard bigraded algebras
ND Hoang, NV Trung - Mathematische Zeitschrift, 2003 - Springer
This paper investigates Hilbert polynomials of bigraded algebras which are generated by
elements of bidegrees (1,0),(d_1,1),...,(d_r,1), where d_1,...,d_r are non-negative integers …
elements of bidegrees (1,0),(d_1,1),...,(d_r,1), where d_1,...,d_r are non-negative integers …