Convex Cones in Finite - Dimensional Real Vector

نویسنده

  • Milan Studen
چکیده

Various classes of nite-dimensional closed convex cones are studied. Equivalent characterizations of pointed cones, pyramids and rational pyramids are given. Special class of regular cones, corresponding to \continuous linear" quasiorderings of integer vectors is introduced and equivalently characterized. It comprehends both pointed cones and rational pyramids. Two diierent ways of determining of vector quasiorderings are dealt with: establishing (i. e. prescribing a set of`positive' vectors) and inducing through scalar product. The existence of the least nite set of normalized integer vectors establishing every nitely establishable (or equivalently nitely inducable) ordering of integer vectors is shown. For every quasiordering of integer vectors established by a nite exhaustive set there exists the least nite set of normalized integer vectors inducing it and elements of this set can be distinguished by corresponding`positive' integer vectors.

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Convex cones in finite-dimensional real vector spaces

Various classes of finite-dimensional closed convex cones are studied. Equivalent characterizations of pointed cones, pyramids and rational pyramids are given. Special class of regular cones, corresponding to "continuous linear" quasiorderings of integer vectors is introduced and equivalently characterized. It comprehends both pointed cones and rational pyramids. Two different ways of determini...

متن کامل

Functionally closed sets and functionally convex sets in real Banach spaces

‎Let $X$ be a real normed  space, then  $C(subseteq X)$  is  functionally  convex  (briefly, $F$-convex), if  $T(C)subseteq Bbb R $ is  convex for all bounded linear transformations $Tin B(X,R)$; and $K(subseteq X)$  is  functionally   closed (briefly, $F$-closed), if  $T(K)subseteq Bbb R $ is  closed  for all bounded linear transformations $Tin B(X,R)$. We improve the    Krein-Milman theorem  ...

متن کامل

Toric Varieties and Lattice Polytopes

We begin with a lattice N isomorphic to Z. The dual lattice M of N is given by Hom(N,Z); it is also isomorphic to Z. (The alphabet may appear to be going backwards; but this notation is standard in the literature.) We write the pairing of v ∈ N and w ∈M as 〈v, w〉. A cone in N is a subset of the real vector space NR = N ⊗R generated by nonnegative R-linear combinations of a set of vectors {v1, ....

متن کامل

Bornological Completion of Locally Convex Cones

In this paper, firstly, we obtain some new results about bornological convergence in locally convex cones (which was studied in [1]) and then we introduce the concept of bornological completion for locally convex cones. Also, we prove that the completion of a bornological locally convex cone is bornological. We illustrate the main result by an example.

متن کامل

Semidefinite descriptions of separable matrix cones

Let K ⊂ E, K′ ⊂ E′ be convex cones residing in finite-dimensional real vector spaces. An element y in the tensor product E ⊗ E′ is K ⊗ K′-separable if it can be represented as finite sum y = P l xl ⊗ x ′ l, where xl ∈ K and x ′ l ∈ K ′ for all l. Let S(n), H(n), Q(n) be the spaces of n × n real symmetric, complex hermitian and quaternionic hermitian matrices, respectively. Let further S+(n), H+...

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

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015