Pseudo-embeddings and quadratic sets of quadrics
نویسندگان
چکیده
A quadratic set of a nonsingular quadric Q Witt index at least three is defined as points intersecting each subspace in possibly reducible that subspace. By using the theory pseudo-embeddings and pseudo-hyperplanes, we show if one quadrics $$Q^+(5,2)$$ , Q(6, 2), $$Q^-(7,2)$$ then sets are precisely intersections with ambient projective space Q. In order to achieve this goal, will determine universal pseudo-embedding geometry planes
منابع مشابه
biaccessibility in quadratic julia sets
در این رساله برای چندجمله ای های درجه ی دوم با مجموعه ی ژولیای همبند موضعی; ثابت خواهیم کرد: اندازه برولین مجموعه نقاط از دو سو دست یافتنی در چندجمله ای های درجه دو برابر با صفر است مگر چندجمله ای چبی شف که برابر با یک است. و برای چندجمله ای های درجه دوم با نقاط ثابت خنثی غیر گویا ثابت خواهیم کرد: 1)هر نقطه ی از دو سو دست یافتنی در حالت زیگل نهایتا به نقطه ی بحرانی و در حالت کرمر به نقطه ث...
Quadratic embeddings
The quadratic Veronese embedding ρ maps the point set P of PG(n, F ) into the point set of PG( (n+2 2 ) − 1, F ) (F a commutative field) and has the following well-known property: If M ⊂ P, then the intersection of all quadrics containing M is the inverse image of the linear closure of Mρ. In other words, ρ transforms the closure from quadratic into linear. In this paper we use this property to...
متن کاملQuasilinear Quadratic Forms and Function Fields of Quadrics
Let p and q be anisotropic quadratic forms of dimension ≥ 2 over a field F . In a recent article, we formulated a conjecture describing the general constraints which the dimensions of p and q impose on the isotropy index of q after scalar extension to the function field of p. This can be viewed as a generalization of Hoffmann’s Separation Theorem which simultaneously incorporates and refines so...
متن کاملOn the duality of quadratic minimization problems using pseudo inverses
In this paper we consider the minimization of a positive semidefinite quadratic form, having a singular corresponding matrix $H$. We state the dual formulation of the original problem and treat both problems only using the vectors $x in mathcal{N}(H)^perp$ instead of the classical approach of convex optimization techniques such as the null space method. Given this approach and based on t...
متن کاملAnalytical aspects of the interval unilateral quadratic matrix equations and their united solution sets
This paper introduces the emph{interval unilateral quadratic matrix equation}, $IUQe$ and attempts to find various analytical results on its AE-solution sets in which $A,B$ and $CCC$ are known real interval matrices, while $X$ is an unknown matrix. These results are derived from a generalization of some results of Shary. We also give sufficient conditions for non-emptiness of some quasi-solutio...
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: Designs, Codes and Cryptography
سال: 2021
ISSN: ['0925-1022', '1573-7586']
DOI: https://doi.org/10.1007/s10623-021-00971-8