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检索条件"机构=Center for Research and Development in Mathematics and Applications"
321 条 记 录,以下是61-70 订阅
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Injective hulls of quantale-enriched multicategories
arXiv
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arXiv 2020年
作者: Martinelli, Eros Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Portugal
In this communication we generalize some recent results of Rump to categories enriched in a commutative quantale V. Using these results, we show that every quantale-enriched multicategory admits an injective hull. Fin...
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Infinite families of hypertopes from centrally symmetric polytopes
arXiv
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arXiv 2021年
作者: Piedade, Claudio Alexandre Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Portugal
We construct infinite families of abstract regular polytopes of type {4, p1, . . ., pn−1} from extensions of centrally symmetric spherical abstract regular n-polytopes. In addition, by applying the halving operation, ... 详细信息
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Local distortion of monogenic functions
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AIP Conference Proceedings 2012年 第1期1493卷 703-709页
作者: J. Morais C. A. Nolder Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Portugal Department of Mathematics Florida State University Tallahassee USA
A conformal mapping in a plane domain locally maps circles to circles. More generally, quasiconformal mappings locally map circles to ellipses of bounded distortion. In this paper the authors study the corresponding s...
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High-order observability conditions for control systems
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2nd World Congress on Computer Science and Information Engineering, CSIE 2011
作者: Miranda, Francisco Smirnov, Georgi Center for Research and Development in Mathematics and Applications School of Technology and Management University of Aveiro Avenida do Atlântico 4900-348 Viana do Castelo Portugal Department of Mathematics and Applications School of Sciences University of Minho Campus de Gualtar 4710-057 Braga Portugal
Observability problem for non-autonomous systems is considered. We deduce high-order observability conditions using the techniques developed in [8] and [9] for stabilization problem, and show that the stabilizer const... 详细信息
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Advanced Methods in the Fractional Calculus of Variations  1
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丛书名: SpringerBriefs in Applied Sciences and Technology
2015年
作者: Agnieszka B. Malinowska, Tatiana Odzijewicz, Delfim F.M. Torres (auth.)
This brief presents a general unifying perspective on the fractional calculus. It brings together results of several recent approaches in generalizing the least action principle and the EulerLagrange equations to incl...
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A new class of convolutional codes and its use in the McEliece Cryptosystem
arXiv
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arXiv 2018年
作者: Almeida, P. Napp, D. CIDMA - Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Portugal
In this paper we present a new class of convolutional codes that admits an efficient algebraic decoding algorithm. We study some of its properties and show that it can decode interesting sequences of errors patterns. ... 详细信息
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An orthogonal decomposition of the complex quaternion Hilbert space and its applications
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AIP Conference Proceedings 2012年 第1期1493卷 595-602页
作者: H. T. Le J. Morais W. Sprößig Freiberg University of Mining and Technology Freiberg Germany Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Portugal
It is well known that the presence of orthogonal decompositions for Hilbert spaces is particularly important to the study of certain boundary value problems of systems of partial differential equations. During the las...
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A pretorsion theory for the category of all categories
arXiv
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arXiv 2020年
作者: Xarez, João José CIDMA Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Portugal
A pretorsion theory for the category of all categories is presented. The associated prekernels and precokernels are calculated for every *** Codes 18E40, 18B99 Copyright © 2020, The Authors. All rights reserved.
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Fractional Noether's theorem with classical and Riemann-Liouville derivatives
Fractional Noether's theorem with classical and Riemann-Liou...
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IEEE Conference on Decision and Control
作者: Gastão S. F. Frederico Delfim F. M. Torres Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Aveiro Portugal
We prove a Noether type symmetry theorem to fractional problems of the calculus of variations with classical and Riemann-Liouville derivatives. As result, we obtain constants of motion (in the classical sense) that ar... 详细信息
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THE MONOTONE-LIGHT FACTORIZATION FOR 2-CATEGORIES VIA 2-PREORDERS
arXiv
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arXiv 2022年
作者: Xarez, João J. CIDMA - Center for Research and Development in Mathematics and Applications Department of Mathematics University of Aveiro Portugal
It is shown that the reflection 2Cat → 2Preord of the category of all 2-categories into the category of 2-preorders determines a monotone-light factorization system on 2Cat and that the light morphisms are precisely ... 详细信息
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