نتایج جستجو برای: w jordan
تعداد نتایج: 212114 فیلتر نتایج به سال:
Given the set of square matrices M ⊂ Mn+m(C) that keep the subspace W = Cnx{0} ⊂ C invariant, we obtain the implicit form of a miniversal deformation of a matrix a ∈ M, and we compute it explicitely when this matrix is marked (this is, if there is a permutation matrix p ∈ Mn+m(C) such that p−1ap is a Jordan matrix). We derive some applications to tackle the classical Carlson problem.
Lubka T. Roumenina,1-3 Mathieu Jablonski,1-3 Christophe Hue,1-3 Jacques Blouin,4 Jordan D. Dimitrov,1-3 Marie-Agnes Dragon-Durey,1-4 Mathieu Cayla,1-3 Wolf H. Fridman,1-4 Marie-Alice Macher,5 David Ribes,6 Luc Moulonguet,7 Lionel Rostaing,6 Simon C. Satchell,8 Peter W. Mathieson,8 Catherine Sautes-Fridman,1-3 Chantal Loirat,5 Catherine H. Regnier,1-3 Lise Halbwachs-Mecarelli,9 and Veronique Fre...
Let $nin mathbb{N}$. An additive map $h:Ato B$ between algebras $A$ and $B$ is called $n$-Jordan homomorphism if $h(a^n)=(h(a))^n$ for all $ain A$. We show that every $n$-Jordan homomorphism between commutative Banach algebras is a $n$-ring homomorphism when $n < 8$. For these cases, every involutive $n$-Jordan homomorphism between commutative C-algebras is norm continuous.
Let $\mathbb X$ and Y$ be $\ell$-connected Jordan domains, $\ell \in \mathbb N$, with rectifiable boundaries in the complex plane. We prove that any boundary homeomorphism $\varphi \colon \partial X \to admits a Sobolev homeomorphic extension $h \overline{\mathbb X} Y}$ $W^{1,1} (\mathbb X, C)$. If instead has $s$-hyperbolic growth $s>p-1$, we show existence of such an lies class $W^{1,p} C)$ f...
using fixed pointmethods, we investigate approximately higher ternary jordan derivations in banach ternaty algebras via the cauchy functional equation$$f(lambda_{1}x+lambda_{2}y+lambda_3z)=lambda_1f(x)+lambda_2f(y)+lambda_3f(z)~.$$
The purpose of this note is to state without proof certain. results on polynomial approximation to harmonic functions whose proofs will appear elsewhere later. In the plane of the complex variable z = x + iy, a (real) function u(z) harmonic in the interior of the Jordan curve C and continuous in the corresponding closed region C can be represented in C by a uniformly convergent series of harmon...
THEOREM I. Let C be an arbitrary closed Jordan region of the (x, y)-plane, and let w = {z), z~x+iy, be a function which maps conformally the exterior of C onto the exterior of the unit circle in the w-plane so that the points at infinity correspond to each other. Let CR denote the curve \cf>(z) \=R, R>1, that is, the transform onto the z-plane of the circle \w\ = R. A necessary and sufficien...
We present an extension of the Combination Lemma of GSS89] that expresses the complexity of one or several faces in the overlay of many arrangements, as a function of the number of arrangements, the number of faces, and the complexities of these faces in the separate arrangements. Several applications of the new Combination Lemma are presented: We rst show that the complexity of a single face i...
A difficult step in the derivation of the strong forms of the Cauchy theorem, Green's lemma, and related theorems from the corresponding weak forms is the construction, for a given rectifiable Jordan curve J, of a sequence of Jordan polygons lying interior to / , converging to J", and having uniformly bounded lengths. This note presents what the author believes to be a simpler elementary constr...
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