Contact forms with large systolic ratio in dimension three
نویسندگان
چکیده
منابع مشابه
Contact CR-Warped product submanifolds in Kenmotsu space forms
Abstract: In the present paper, we give a necessary and sufficient condition for contact CR-warped product to be contact CR-product in Kenmotsu space forms.
متن کاملMapping of three-dimensional contact problems into one dimension.
We consider a contact problem between two three-dimensional bodies with randomly rough surfaces and show how this problem can be reduced from three to one dimension without loss of essential contact properties. This means a huge reduction of computation time and allows the simulation of multiscale systems to include essentially all of the scales from nanometer to macroscopic in a single model.
متن کاملSystolic Expanders of Every Dimension
In recent years a high dimensional theory of expanders has emerged. The notion of combinatorial expanders of graphs (i.e. the Cheeger constant of a graph) has seen two generalizations to high dimensional simplicial complexes. One generalization, known as coboundary expansion is due to Linial and Meshulem; the other, which we term here systolic expansion, is due to Gromov, who showed that systol...
متن کاملContact CR Submanifolds of maximal Contact CR dimension of Sasakian Space Form
In this paper, we investigate contact CR submanifolds of contact CR dimension in Sasakian space form and introduce the general structure of these submanifolds and then studying structures of this submanifols with the condition h(FX,Y)+h(X,FY)=g(FX,Y)zeta, for the normal vector field zeta, which is nonzero, and we classify these submanifolds.
متن کاملon numerical semigroups with embedding dimension three
let $fneq1,3$ be a positive integer. we prove that there exists a numerical semigroup $s$ with embedding dimension three such that $f$ is the frobenius number of $s$. we also show that the same fact holds for affine semigroups in higher dimensional monoids.
متن کاملذخیره 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: ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE
سال: 2019
ISSN: 2036-2145,0391-173X
DOI: 10.2422/2036-2145.201709_005