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The purpose of this paper is to study finite-dimensional Lie algebras over a field k of characteristic zero which admit a commutative polarization (CP). Among the many results and examples, it is shown that, if k is algebraically closed, the nilradical N of a parabolic subalgebra in A_n and C_n has such a CP.
ELASHVILI, Alexander, OOMS, Alfons
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Apuntes sobre "Esa vez del huaico" de Vargas Vicuña
El artículo no presenta resumen.
Antonio Cornejo Polar
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MHD Modeling of Mass Transfer Processes in Close Binary Stars
A three-dimensional numerical model has been developed to study the flow structure in close binary systems with a magnetic field. The model uses a system of equations of modified magnetic hydrodynamics, which allows describing all the main dynamic ...
Andrey Zhilkin +2 more
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Time‐lapse cameras reveal latitude and season influence breeding phenology durations in penguins
Variation in the phenology of avian taxa has long been studied to understand how a species reacts to environmental changes over both space and time. Penguins (Sphenicidae) serve as an important example of how biotic and abiotic factors influence certain ...
Caitlin Black +5 more
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Postures langagières chez Janis Otsiemi et Mongo Beti
Cet article examine la posture langagière dans le roman d’Afrique francophone à partir des polars de Janis Otsiemi et Mongo Beti. Il pose l’hypothèse que la posture langagière chez ces deux écrivains traduit une réalité sociale, complexifiée par la ...
Adama Togola
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Polarization and polar climate [PDF]
International Polar Year 2012 Conference: From Knowledge to Action;Montreal, Quebec, Canada, 22–27 April 2012 As a follow‐ up to the 2007–2008 International Polar Year (IPY), more than 3000 international participants came together in April 2012 at a conference entitled “From Knowledge to Action.” The conference addressed a broad scope of topics beyond ...
James Overland, Peter Schweitzer
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It is once again time to thank all the scientists— not only those whose names are printed on the following pages—who have kindly served as referees for Polar Research during the last couple of ...
Goldman, Helle V.
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Evidence of temperature control on mesopelagic fish and zooplankton communities at high latitudes
Across temperate and equatorial oceans, a diverse community of fish and zooplankton occupies the mesopelagic zone, where they are detectable as sound-scattering layers. At high latitudes, extreme day-night light cycles may limit the range of some species,
Julek Chawarski +4 more
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On the Measurement of Polarization [PDF]
Summary: Suppose that a population of individuals may be grouped according to some vector of characteristics into ``clusters'', such that each cluster is very ``similar'' in terms of the attributes of its members, but different clusters have members with very ``dissimilar'' attributes. In that case we say that the society is polarized.
Esteban, Joan, Ray, Debraj
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Norway and past International Polar Years—a historical account
Surveying Norway’s role in past International Polar Years (IPYs), this essay by historian Stian Bones contributes to a broader understanding of Norway as a “polar nation”. He describes the strengths of Norway’s scientific traditions in the polar regions,
Bones, Stian
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