Some examples of unimodal Gorenstein sequences

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Some Examples of Gorenstein Liaison in Codimension Three

Gorenstein liaison seems to be the natural notion to generalize to higher codimension the well-known results about liaison o varieties of codimension 2 in projective space. In this paper we study points in P and cuves in P in an attempt to see how far typical codimension 2 results will extend. While the results are satisfactory for small degree, we find in each case examples where we cannot dec...

متن کامل

Unimodal inversion sequences and related pattern classes

Four of these classes were separately shown previously to be enumerated by this sequence, while the five others are new. In chronological order of publication, see [1, Lemma 10] for T2, [4, Example 6.4] for T9, [9, Theorems 3.4 and 3.5] for T4, and [3, Section 3.3] for T8. The same sequence also enumerates unimodal inversion sequences [8]. An inversion sequence (subexcedant sequence, a reversal...

متن کامل

Divisorial Contractions to Some Gorenstein Singularities

Divisorial contractions to singularities, defined by equations xy + zn + un = 0 n ≥ 3 and xy + z + u = 0 are classified. The problem of birational classification of algebraic varieties is highly interconnected with the problem of description of singularities on them. One of the most important class of three-dimensional singularities is terminal singularities, which arise within minimal models p...

متن کامل

Asymptotic formulas for stacks and unimodal sequences

We study enumeration functions for unimodal sequences of positive integers, where the size of a sequence is the sum of its terms. We survey known results for a number of natural variants of unimodal sequences, including Auluck’s generalized Ferrers diagrams, Wright’s stacks, and Andrews’ convex compositions. These results describe combinatorial properties, generating functions, and asymptotic f...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of Pure and Applied Algebra

سال: 1995

ISSN: 0022-4049

DOI: 10.1016/0022-4049(95)00109-a