Asghar Rahimi
University of Maragheh
[ 1 ] - Woven fusion frames in Hilbert spaces and some of their properties
Extending and improving the concepts: woven frame and fusion frames, we introduce the notion of woven fusion frames in Hilbert spaces. We clarify our extension and generalization by some examples of woven frames and woven fusion frames. Also, we present some properties of woven fusion frames, especially we show that for given two woven frames of sequences, one can build woven fusion frames and ...
[ 2 ] - A note on "Generalized bivariate copulas and their properties"
In 2004, Rodr'{i}guez-Lallena and '{U}beda-Flores have introduced a class of bivariate copulas which generalizes some known families such as the Farlie-Gumbel-Morgenstern distributions. In 2006, Dolati and '{U}beda-Flores presented multivariate generalizations of this class. Then in 2011, Kim et al. generalized Rodr'{i}guez-Lallena and '{U}beda-Flores' study to any given copula family. But ther...
[ 3 ] - Invariance of Fréchet frames under perturbation
Motivating the perturbations of frames in Hilbert and Banach spaces, in this paper we introduce the invariance of Fr'echet frames under perturbation. Also we show that for any Fr'echet spaces, there is a Fr'echet frame and any element in these spaces has a series expansion.
[ 4 ] - قابها روی فضاهای باناخ- p خواص جدید نگاشتهای بدست آمده توسط
قابها-p روی فضاهای باناخ توسیع مستقیمی از قابها روی فضاهای هیلبرت می باشند. برخلاف انواع دیگر قابها، نگاشت -قابها به دلیل خطی نبودن نگاشت دوگانی، خاصیت خطی و عملگری خود را از دست داده و مانند یک نگاشت غیر خطی -p قاب مانند -pقابها خواصی از نگاشت -p به دوگان آن عمل می کند. در این مقاله با گذاشتن شرایطی روی X از فضای باناخ ،$T^{perp}$با الحاق عملگر U بطور ضعیف پیوستگی، یکن...
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