Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Kollar, Richard"'
Autor:
Medo, Matus, Suster, Martin, Bodova, Katarina, Brazinova, Alexandra, Brejova, Brona, Kollar, Richard, Leksa, Vladimir, Lindbloom, Jana, Nosek, Jozef, Vinar, Tomas
Pavelka et al. (Science, Reports, 7 May 2021) claim that a single round of population-wide antigen testing in Slovakia reduced the observed COVID-19 prevalence by 58%, and that it played a substantial role in curbing the pandemic. We argue that this
Externí odkaz:
http://arxiv.org/abs/2105.13633
Autor:
Bodova, Katarina, Kollar, Richard
We study the reported data from the COVID-19 pandemic outbreak in January - May 2020 in 119 countries. We observe that the time series of active cases in individual countries (the difference of the total number of confirmed infections and the sum of
Externí odkaz:
http://arxiv.org/abs/2005.06933
Various approaches to studying the stability of solutions of nonlinear PDEs lead to explicit formulae determining the stability or instability of the wave for a wide range of classes of equations. However, these are typically specialized to a particu
Externí odkaz:
http://arxiv.org/abs/1906.04453
Publikováno v:
In Physica D: Nonlinear Phenomena 15 December 2022 442
Autor:
Kollar, Richard
Thesis (Ph. D.) -- University of Maryland, College Park, 2004.
Thesis research directed by: Mathematics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in pape
Thesis research directed by: Mathematics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in pape
Externí odkaz:
http://hdl.handle.net/1903/1488
Biopolymer length regulation is a complex process that involves a large number of subprocesses acting simultaneously across multiple spatial and temporal scales. An illustrative example important for genomic stability is the length regulation of telo
Externí odkaz:
http://arxiv.org/abs/1402.0430
Autor:
Kollár, Richard, Bosák, Radomír
We survey index theorems counting eigenvalues of linearized Hamiltonian systems and characteristic values of polynomial operator pencils. We present a simple common graphical interpretation and generalization of the index theory using the concept of
Externí odkaz:
http://arxiv.org/abs/1212.5691
Autor:
Kollár, Richard, Miller, Peter D.
Two concepts, very different in nature, have proved to be useful in analytical and numerical studies of spectral stability: (i) the Krein signature of an eigenvalue, a quantity usually defined in terms of the relative orientation of certain subspaces
Externí odkaz:
http://arxiv.org/abs/1209.3185
Autor:
Kollár, Richard, Pego, Robert L.
Publikováno v:
Appl. Math. Res. Express 2012 (2012), pp. 1--46
We investigate spectral stability of vortex solutions of the Gross-Pitaevskii equation, a mean-field approximation for Bose-Einstein condensates (BEC) in an effectively two-dimensional axisymmetric harmonic trap. We study eigenvalues of the lineariza
Externí odkaz:
http://arxiv.org/abs/1103.0157
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