Results 1 to 10 of about 899,485 (384)
On almost distance-regular graphs [PDF]
Journal of Combinatorial Theory, Series A 118 (2011), 1094-1113, 2010 Distance-regular graphs are a key concept in Algebraic Combinatorics and have given rise to several generalizations, such as association schemes. Motivated by spectral and other algebraic characterizations of distance-regular graphs, we study `almost ...
B.L. Gorissen +32 more
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Regular, pseudo-regular, and almost regular matrices [PDF]
arXiv, 2007 We give lower bounds on the largest singular value of arbitrary matrices, some of which are asymptotically tight for almost all matrices. To study when these bounds are exact, we introduce several combinatorial concepts. In particular, we introduce regular, pseudo-regular, and almost regular matrices.
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Judgement of paintings belonging to different tendencies in the 20th century painting [PDF]
Psihologija, 2004 In this study Trifunović’ hypothesis that there are three objective lines in the development of modern art was psychologically evaluated. According to Trifunović, in the first line (Cézanne - cubism - neoplasticism - suprematism) the geometrization of ...
Radonjić Ana, Marković Slobodan
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On uniform regularity and strong regularity [PDF]
Optimization, 2018 We investigate uniform versions of (metric) regularity and strong (metric) regularity on compact subsets of Banach spaces, in particular, along continuous paths. These two properties turn out to play a key role in analyzing path-following schemes for tracking a solution trajectory of a parametric generalized equation or, more generally, of a ...
R. Cibulka, J. Preininger, T. Roubal
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Advances in Nonlinear Analysis, 2021 We consider quasilinear elliptic systems in divergence form. In general, we cannot expect that weak solutions are locally bounded because of De Giorgi’s counterexample. Here we assume that off-diagonal coefficients have a “butterfly support”: this allows
Leonardi Salvatore +3 more
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Regular Ultrapowers at Regular Cardinals [PDF]
Notre Dame Journal of Formal Logic, 2015 In earlier work of the second and third author the equivalence of a finite square principle square^fin_{lambda,D} with various model theoretic properties of structures of size lambda and regular ultrafilters was established. In this paper we investigate the principle square^fin_{lambda,D}, and thereby the above model theoretic properties, at a regular ...
Kennedy, J., Shelah, S., Väänänen, J.
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Modeling the dynamic semantics of a computer program
Цифровые модели и решения, 2023 In this paper, two approaches are used to construct the dynamic semantics of computer programs: the first is the representation of mathematical models of computational processes generated by a computer program in the form of a discrete transformer; the ...
K. E. Iklassova, R. N. Kozhakhmetova
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On regular but not completely regular spaces [PDF]
Topology and its Applications, 2019 We present how to obtain non-comparable regular but not completely regular spaces. We analyze a generalization of Mysior's example, extracting its underlying purely set-theoretic framework. This enables us to build simple counterexamples, using the Niemytzki plane, the Songefrey plane or Lusin gaps.
Piotr Kalemba, Szymon Plewik
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Star-regularity and regular completions [PDF]
Journal of Pure and Applied Algebra, 2014 In this paper we establish a new characterisation of star-regular categories, using a property of internal reflexive graphs, which is suggested by a recent result due to O. Ngaha Ngaha and the first author. We show that this property is, in a suitable sense, invariant under regular completion of a category in the sense of A. Carboni and E. M.
Marino Gran +2 more
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On the sub–diffusion fractional initial value problem with time variable order
Advances in Nonlinear Analysis, 2021 We consider a fractional derivative with order varying in time. Then, we derive for it a Leibniz' inequality and an integration by parts formula. We also study an initial value problem with our time variable order fractional derivative and present a ...
Cuesta Eduardo +3 more
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