Controlling Almost-Invariant Halfspaces in Both Real and Complex Settings
نویسندگان
چکیده
منابع مشابه
SEMIGROUP ACTIONS , WEAK ALMOST PERIODICITY, AND INVARIANT MEANS
Let S be a topological semigroup acting on a topological space X. We develop the theory of (weakly) almost periodic functions on X, with respect to S, and form the (weakly) almost periodic compactifications of X and S, with respect to each other. We then consider the notion of an action of Son a Banach space, and on its dual, and after defining S-invariant means for such a space, we give a...
متن کاملThe Continued Utility and Viability of Dakin’s Solution in Both High- and Low-resource Settings
Healthcare is expensive and often inaccessible to many. As a result, surgeons must consider simple, less expensiveinterventions when possible. For wound care, an older but quite effective cleaning agent is Dakin’s solution (0.5%sodium hypochlorite), an easily made mixture of 100 milliliters (ml) bleach with 8 teaspoons (tsp) baking soda into agallon of clean water or 25 ml ble...
متن کاملRegular Type of Real Hyper-surfaces in (almost) Complex Manifolds
The regular type of a real hyper-surface M in an (almost) complex manifold at some point p is the maximal contact order at p of M with germs of non singular (pseudo) holomorphic disks. The main purpose of this paper is to give two intrinsic characterizations the type : one in terms of Lie brackets of a complex tangent vector field on M , the other in terms of some kind of derivatives of the Lev...
متن کاملAlmost Self-Bounded Controlled-Invariant Subspaces and Almost Disturbance Decoupling
The objective of this contribution is to characterize the so-called finite fixed poles of the Almost Disturbance Decoupling Problem by state feedback (ADDP) ′ . The most important step towards this result relies on the extension to almost invariant subspaces of the key notion of self-boundedness, as initially introduced by Basile and Marro for perfect controlled-invariants, namely, we introduce...
متن کاملNonexistence of Invariant Rigid Structures and Invariant Almost Rigid Structures
We prove that certain volume preserving actions of Lie groups and their lattices do not preserve rigid geometric structures in the sense of Gromov. The actions considered are the ”exotic” examples obtained by Katok and Lewis and the first author, by blowing up closed orbits in the well known actions on homogeneous spaces. The actions on homogeneous spaces all preserve affine connections, wherea...
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: Integral Equations and Operator Theory
سال: 2017
ISSN: 0378-620X,1420-8989
DOI: 10.1007/s00020-016-2339-5