925 resultados para Convex Duality


Relevância:

20.00% 20.00%

Publicador:

Resumo:

Mode of access: Internet.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Mode of access: Internet.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Thesis (Ph.D.)--University of Washington, 2016-08

Relevância:

20.00% 20.00%

Publicador:

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Studiamo l'operatore di Ornstein-Uhlenbeck e il semigruppo di Ornstein-Uhlenbeck in un sottoinsieme aperto convesso $\Omega$ di uno spazio di Banach separabile $X$ dotato di una misura Gaussiana centrata non degnere $\gamma$. In particolare dimostriamo la disuguaglianza di Sobolev logaritmica e la disuguaglianza di Poincaré, e grazie a queste disuguaglianze deduciamo le proprietà spettrali dell'operatore di Ornstein-Uhlenbeck. Inoltre studiamo l'equazione ellittica $\lambdau+L^{\Omega}u=f$ in $\Omega$, dove $L^\Omega$ è l'operatore di Ornstein-Uhlenbeck. Dimostriamo che per $\lambda>0$ e $f\in L^2(\Omega,\gamma)$ la soluzione debole $u$ appartiene allo spazio di Sobolev $W^{2,2}(\Omega,\gamma)$. Inoltre dimostriamo che $u$ soddisfa la condizione di Neumann nel senso di tracce al bordo di $\Omega$. Questo viene fatto finita approssimazione dimensionale.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The title of Juana Castro’s poetry book publshed in 1978, Cóncava mujer — Concave woman — expresses the hollow nature of the social female subject. From Juana Castro’s point of view, this female social concavity is only allowed to transformed itself into its opposite, the convex women which clearly represents the reproductive role of the female body. These two extreme roles assigned to women, hollowness or maternity, are the poetic paradigms for Juana Castro’s two poetry books analised in this article. As if we were presented with the two sides of a coin, Cóncava mujer and Del dolor y las alas – On anguish and wings--(1982) reflect the author´s concious realisation of the above-mentioned female duality as a defined and percieved subject by male society. Each poetry book, however, respond to two different personal moments, and each result in two different ways of conceiving poetic language. On one hand, the poetic subject of Cóncava mujer emerges with all its force as a feminist voice whose goal is the attack of all aspects of the patriarchal society as the cause of the female concavity. On the other hand, in Del dolor y las alas the poetic voice unfolds her motherhood as both loss and creation: the death of Juana Castro’s son makes the poetic subject incomplete, and therefore a concave one; whereas the poetic discourse appears as the perfect way to occupy the empty space left by the son’s death.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper draws attention for the fact that traditional Data Envelopment Analysis (DEA) models do not provide the closest possible targets (or peers) to inefficient units, and presents a procedure to obtain such targets. It focuses on non-oriented efficiency measures (which assume that production units are able to control, and thus change, inputs and outputs simultaneously) both measured in relation to a Free Disposal Hull (FDH) technology and in relation to a convex technology. The approaches developed for finding close targets are applied to a sample of Portuguese bank branches.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We study electronic transport in a Luttinger liquid with an embedded impurity, which is either a weak scatterer (WS) or a weak link (WL), when interacting electrons are coupled to one-dimensional massless bosons (e.g., acoustic phonons). We find that the duality relation, ?WS?WL=1, between scaling dimensions of the electron backscattering in the WS and WL limits, established for the standard Luttinger liquid, holds in the presence of the additional coupling for an arbitrary fixed strength of boson scattering from the impurity. This means that at low temperatures such a system remains either an ideal insulator or an ideal metal, regardless of the scattering strength. On the other hand, when fermion and boson scattering from the impurity are correlated, the system has a rich phase diagram that includes a metal-insulator transition at some intermediate values of the scattering.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

∗Participant in Workshop in Linear Analysis and Probability, Texas A & M University, College Station, Texas, 2000. Research partially supported by the Edmund Landau Center for Research in Mathematical Analysis and related areas, sponsored by Minerva Foundation (Germany).

Relevância:

20.00% 20.00%

Publicador:

Resumo:

∗ The work is partially supported by NSFR Grant No MM 409/94.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Let E be an infinite dimensional separable space and for e ∈ E and X a nonempty compact convex subset of E, let qX(e) be the metric antiprojection of e on X. Let n ≥ 2 be an arbitrary integer. It is shown that for a typical (in the sence of the Baire category) compact convex set X ⊂ E the metric antiprojection qX(e) has cardinality at least n for every e in a dense subset of E.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

* This work was supported by the CNR while the author was visiting the University of Milan.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

We give a new construction of uniformly convex norms with a power type modulus on super-reflexive spaces based on the notion of dentability index. Furthermore, we prove that if the Szlenk index of a Banach space is less than or equal to ω (first infinite ordinal) then there is an equivalent weak* lower semicontinuous positively homogeneous functional on X* satisfying the uniform Kadec-Klee Property for the weak*-topology (UKK*). Then we solve the UKK or UKK* renorming problems for Lp(X) spaces and C(K) spaces for K scattered compact space.