The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background [PDF]
Astrophysical Journal Letters, 2023 We report multiple lines of evidence for a stochastic signal that is correlated among 67 pulsars from the 15 yr pulsar timing data set collected by the North American Nanohertz Observatory for Gravitational Waves.
G. Agazie +113 more
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A Giambelli formula for classical $G/P$ spaces [PDF]
, 2009 Let $G$ be a classical complex Lie group, $P$ any parabolic subgroup of $G$, and $G/P$ the corresponding partial flag variety. We prove an explicit combinatorial Giambelli formula which expresses an arbitrary Schubert class in the cohomology ring of $G/P$
Harry Tamvakis
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Closure relations for totally nonnegative cells in G/P [PDF]
, 2005 The totally nonnegative part of a partial flag variety G/P is known to have a decomposition into semi-algebraic cells. We show that the closure of a cell is again a union of cells and give a combinatorial description of the closure relations. The totally
K. Rietsch
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Spiritual Streams and Cultural Models Pursued by Russian Literary Scholars exiled in Interwar Czechoslovakia (R. Jakobson versus E. Liatsky) [PDF]
, 2017 Grounded in hitherto unpublished archive material, the paper explores the phenomenon of Russian literary scholars in inter-war Czechoslovakia, with special regard to the clash between this research community and the local context in the early 1920s. Thus
Zelenka, Miloš
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Methodology for permeability coefficients determination using the vacuum infusion technology [PDF]
, 2023 The article describes a special installation allowing real-time determination of the pressure drops within the impregnation process. The installation working zone is a flat permeameter, where the reinforcing material under study is laid, and liquid is ...
Borodulina A. S. +4 more
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First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way [PDF]
, 2023 We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A$^*$), the Galactic center source associated with a supermassive black hole.
K. Akiyama +387 more
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Quantum cohomology of G/P and homology of affine Grassmannian [PDF]
, 2007 Let G be a simple and simply-connected complex algebraic group, P ⊂ G a parabolic subgroup. We prove an unpublished result of D. Peterson which states that the quantum cohomology QH*(G/P) of a flag variety is, up to localization, a quotient of the ...
T. Lam, M. Shimozono
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Современное состояние проблемы выбора способа хирургического лечения больных хроническим панкреатитом [PDF]
, 2017 Выбор вида хирургического вмешательства при хроническом панкреатите строится с учётом клинических проявлений, преимущественной локализации процесса в поджелудочной железе, изменений протоковой системы, а также имеющихся ...
Карпачев, А. А. +4 more
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Розробка моделі дуополії логістичних ланцюгів поставок з врахуванням маркетингової та інноваційної активності виробничих підприємств [PDF]
, 2022 This paper reports the construction and analysis of the economic and mathematical model of the duopoly of supply chains, based on the model of optimization of plans for the release and delivery of multi-range articles, taking into consideration the ...
Kurudzhy, Yuliia +2 more
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A Multifidelity Approach for Bilevel Optimization with Limited Computing Budget
, 2022 Bilevel optimization refers to a specialized class of problems where the optimum of an upper level (UL) problem is sought subject to the optimality of a nested lower level (LL) problem as a constraint. This nested structure necessitates a large number of
Mamun, MM , Ray, T, Singh, HK
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