Omittable Planes
نویسندگان
چکیده
منابع مشابه
Omittable Planes
In analogy to omittable lines in the plane, we initiate the study of omittable planes in 3-space. Given a collection of n planes in real projective 3-space, a plane Π is said to be omittable if Π is free of ordinary lines of intersection – in other words, if all the lines of intersection of Π with other planes from the collection come at the intersection of three or more planes. We provide two ...
متن کاملflambement des structures planes
l'utilisation de nouvaux materiaux aux caracteristiques mecaniques elevtes et le perfectionement continu des methodes de calcu1,incitent les constructeur a edifier des structures de plus cn plus elancees , de ce fait le probleme du flambement prend une importance sans cesse accrue. la prtsente etude se rapporte a etablir les equations intrinseques d'une poutre droite a section constan...
متن کاملStabbing Planes
We introduce and develop a new semi-algebraic proof system, called Stabbing Planes that is in the style of DPLL-based modern SAT solvers. As with DPLL, there is only one rule: the current polytope can be subdivided by branching on an inequality and its “integer negation.” That is, we can (nondeterministically choose) a hyperplane ax ≥ b with integer coefficients, which partitions the polytope i...
متن کاملHyperbolic planes
A plane is a two-dimensional right vector space V over a division algebra D, which we assume in this paper has an involution; a hermitian form h : V × V −→ D is hyperbolic, if, with respect to a properly choosen basis, it is given by the matrix 0 1 1 0 ) ; the pair (V, h) is called a hyperbolic plane. If D is central simple over a number field K, a hyperbolic plane (V, h) gives rise to a reduct...
متن کاملGravitational Couplings for Gop-planes and Y-op-planes
The results that this paper presents are about gravitational couplings for generalized orientifold planes (GOp-planes) and y-deformed orientifold planes (yOpplanes). The usual orientifold planes do not have gauge fields on their worldvolumes and . The generalized orientifold planes that this paper consider have SO(2k) Yang-Mills gauge fields-bundles over their corresponding worldvolumes. The ai...
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: The Electronic Journal of Combinatorics
سال: 2011
ISSN: 1077-8926
DOI: 10.37236/662