Results 21 to 30 of about 271,661 (205)

Schur complements in Krein spaces [PDF]

, 2007
The aim of this work is to generalize the notions of Schur complements and shorted operators to Krein spaces. Given a (bounded) J-selfadjoint operator A (with the unique factorization property) acting on a Krein space H and a suitable closed subspace S ...
Maestripieri, Alejandra Laura, Martinez Peria, Francisco Dardo   +1 more
core   +1 more source

Oblique projections and frames [PDF]

, 2006
We characterize those frames on a Hilbert space H which can be represented as the image of an orthonormal basis by an oblique projection defined on an extension K of H.
Antezana, Jorge Abel, Corach, Gustavo, Ruiz, Mariano Andres, Stojanoff, Demetrio   +3 more
core   +2 more sources

A note on the star order in Hilbert spaces [PDF]

, 2010
We study the star order on the algebra L(H) of bounded operators on a Hilbert space H. We present a new interpretation of this order which allows to generalize to this setting many known results for matrices: functional calculus, semi-lattice properties,
Antezana, Jorge Abel, Cano, Cristina, Mosconi, Irene, Stojanoff, Demetrio   +3 more
core   +1 more source

Estilo libre (2022) de Ludwig Saavedra. Una voz nueva en un nuevo siglo

América Crítica, 2023
Esta nota es un comentario a la obra de Ludwig Saavedra Estilo libre, Huancayo: Hachumera editorial, 2022.
Guissela Gonzales Fernández
doaj   +1 more source

Metric geodesics of isometries in a Hilbert space and the extension problem [PDF]

, 2007
We consider the problem of finding short smooth curves of isometries in a Hilbert space H. The length of a smooth curve γ(t), t ∈ [0, 1], is measured by means of ∫^1-0 γ^. (t)ǀǀ dt, where ǀǀ ǀǀ denotes the usual norm of operators.
Andruchow, Esteban, Recht, Lázaro, Varela, Alejandro   +2 more
core   +1 more source

Olivari: Envoi

Poligramas, 2017
 En el siguiente trabajo se intentará una revisión crítica de la trayectoria literaria del poeta argentino Nicolás Olivari, autor, según nuestra opinión, injustamente olvidado, con la esperanza de que estas breves reflexiones incentiven la relectura de ...
Miguel Santoro
doaj   +1 more source

Effective four-fermion operators in top physics: a roadmap [PDF]

, 2011
We write down a minimal basis for dimension-six gauge-invariant four-fermion operators, with some operator replacements with respect to previous ones which make it simpler for calculations.
Aaltonen, Abazov, Aguilar-Saavedra, Aguilar-Saavedra, Aguilar-Saavedra, Aguilar-Saavedra, Aguilar-Saavedra, Aguilar-Saavedra, Aguilar-Saavedra, Ananthanarayan, Arzt, Bar-Shalom, Buchmuller, Burgess, Cao, del Aguila, del Aguila, del Aguila, Ferreira, Glashow, Grzadkowski, Grzadkowski, J.A. Aguilar-Saavedra, Jung, Leung, Nomura, Pumplin, Vermaseren   +27 more
core   +4 more sources

En este número

Endoscopia, 2021
«Confía en el tiempo, que suele dar dulces salidas a muchas amargas dificultades.” Miguel de Cervantes ...
Enrique Murcio-Pérez
doaj   +1 more source

Stance-taking in Spanish-speaking Preschoolers' Argumentative Interaction [PDF]

, 2019
The aim of this study is to determine what linguistic resources are used for stance-taking in confrontational interactions. For this purpose, we analyze 70 argumentative sequences in spontaneous peer conversations during play situations of 4 dyads (2 mid
Migdalek, Maia Julieta, Rosemberg, Celia Renata, Shiro, Martha   +2 more
core   +1 more source

Susie Saavedra

Policy Perspectives, 2018
Susie Saavedra was recently promoted to Vice President for Policy and Legislative Affairs at the National Urban League Washington Bureau. Prior to this role, she served as Senior Director for the same department. Specifically, Ms. Saavedra is the League’s chief education and health policy officer, a responsibility she has held since 2013.
openaire   +1 more source