Results 21 to 30 of about 291,591 (280)

Complete intersections in binomial and lattice ideals [PDF]

open access: yes, 2013
For the family of graded lattice ideals of dimension 1, we establish a complete intersection criterion in algebraic and geometric terms. In positive characteristic, it is shown that all ideals of this family are binomial set theoretic complete ...
H. Villarreal, Hiram H. López, Rafael
core   +1 more source

Set-theoretic complete intersections [PDF]

open access: yesProceedings of the American Mathematical Society, 1985
In this article we establish that: (1) Every monomial curve in P k n {\mathbf {P}}_k^n is a set-theoretic complete intersection, where k k is a field of characteristic p p (and thus generalize a result of R. Hartshorne [3]). (2) Let
openaire   +1 more source

Complete integration-by-parts reductions of the non-planar hexagon-box via module intersections

open access: yesJournal of High Energy Physics, 2018
We present the powerful module-intersection integration-by-parts (IBP) method, suitable for multi-loop and multi-scale Feynman integral reduction.
Janko Böhm   +4 more
doaj   +1 more source

Quasi-complete intersections in P2 and syzygies [PDF]

open access: yes, 2019
Let C \in P2 be a reduced, singular curve of degree d and equation f = 0. Let \Sigma denote the jacobian subscheme of C. We have 0 -> E -> 3.O -> I_\Sigma(d-1) -> 0 (the surjection is given by the partials of f).
Ellia, Philippe
core   +2 more sources

Complete intersection dimension [PDF]

open access: yesPublications mathématiques de l'IHÉS, 1997
Let \(A\) be a Noetherian local ring and \(M\) a finitely generated \(A\)-module. In the case where \(\text{pd}_A M < \infty\), the structure of \(M\) is very rigid but we know a little bit if \(\text{pd}_A M = \infty\). In the present paper, the authors define a new invariant of \(M\), called the complete intersection dimension \(\text{CI-dim}_A M ...
Avramov, Luchezar L.   +2 more
openaire   +1 more source

Complete intersections in P^2 through separating sequences

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2007
In this paper we characterize the finite sets of points in P2, arising as a complete intersection of two curves, by means of their realizable sequences. Actually, we show that a reduced 0-dimensional scheme in P2 is a complete intersection of type (a, b)
Massaza, Carla, Beccari, Giannina
doaj   +1 more source

Complete intersections: Moduli, Torelli, and good reduction [PDF]

open access: yes, 2016
We study the arithmetic of complete intersections in projective space over number fields. Our main results include arithmetic Torelli theorems and versions of the Shafarevich conjecture, as proved for curves and abelian varieties by Faltings. For example,
A Hartmann   +36 more
core   +2 more sources

Complete intersection lattice ideals

open access: yesJournal of Algebra, 2005
In this paper we completely characterize lattice ideals that are complete intersections or equivalently complete intersections finitely generated semigroups of $\bz^n\oplus T$ with no invertible elements, where $T$ is a finite abelian group. We also characterize the lattice ideals that are set-theoretic complete intersections on binomials.
Morales, M., Thoma, A.
openaire   +3 more sources

Complete Intersection Hom Injective Dimension [PDF]

open access: yesAlgebras and Representation Theory, 2020
20 ...
Sean K. Sather-Wagstaff   +1 more
openaire   +2 more sources

Revealing electronic state-switching at conical intersections in alkyl iodides by ultrafast XUV transient absorption spectroscopy

open access: yesNature Communications, 2020
The reaction trajectories of photoexcited molecules may involve transitions through conical intersections, which are ubiquitous in nature but challenging to characterize.
Kristina F. Chang   +8 more
doaj   +1 more source

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