Results 61 to 70 of about 28,496 (163)
Laser Observations of GALILEO Satellites at the CBK PAN Astrogeodynamic Observatory in Borowiec
Remote SensingThe laser station (BORL) owned by the Space Research Centre of the Polish Academy of Sciences and situated at the Astrogeodynamic Observatory in Borowiec near Poznań regularly observes more than 100 different objects in low Earth orbit (LEO) and medium ...
Paweł Lejba +5 more
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Subtle structure of streamers under conditions resembling those of Transient Luminous Events
Archives of Mechanics, 2018 The paper presents a brief review of the observational facts related to plasma filamentation in astrophysics and the subtle structures of plasma in Transient Luminous Events (TLE’s) and an analysis of the physical mechanism that could contribute to ...
J.S. Błęcki, K.A. Mizerski
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Every Wijsman topology relative to a Polish space is Polish [PDF]
Proceedings of the American Mathematical Society, 1995 Generalizing a result of G. Beer and a result of E. Effros, we show that if ( X, d ) is a separable and completely metrizable metric space, then the hyperspace of X endowed with the Wijsman topology is separable and completely metrizable.
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Scientific ReportsWe present a study on the dynamical variations of geoelectric fields E during the intense geomagnetic storm of April 23–24, 2023. The storm is caused by the interplanetary counterpart of a coronal mass ejection erupted from the Sun in association with an
Anna Wawrzaszek +5 more
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LEARNING EQUIVALENCE RELATIONS ON POLISH SPACES
The Journal of Symbolic LogicAbstract We investigate natural variations of behaviourally correct learning and explanatory learning—two learning paradigms studied in algorithmic learning theory—that allow us to “learn” equivalence relations on Polish spaces. We give a characterization of the learnable equivalence relations in terms of their Borel complexity and show that the ...
DINO ROSSEGGER +2 more
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Polish spaces, computable approximations, and bitopological spaces
Topology and its Applications, 2002 The authors solve an open problem by showing that every Polish space can be the maximal point space of some bounded complete continuous domain with a countable base (bounded complete continuous domains are sometimes called continuous Scott domains). The bounded complete domain is called a computational model or domain environment for the given space ...
Ciesielski, Krzysztof +2 more
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Miscellanea Geographica: Regional Studies on DevelopmentThe article presents an assessment of Poland's participation in Earth observation programmes within its 10 years of membership in the European Space Agency (ESA).
Zieliński Hubert +2 more
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On the Cauchy integral theorem and Polish spaces
New Zealand Journal of MathematicsWe prove that if a continuous function $f$ in an open subset $U\subset\mathbb{C}$ is analytic in $U\setminus X$, where $X\subset U$ is a Polish space having characteristic system $(k,n)\in\mathbb N_0\times\mathbb N$, then the complex line integral of $f$ along the boundary of any triangle in $U$ vanishes.
Morales, Cristian López +1 more
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Ecological IndicatorsIdentifying and quantifying ecosystem degradation and recovery is of critical importance for ecosystem health, biodiversity, food security and the livelihoods of local communities.
Cristina Domingo-Marimon +7 more
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, 2017 9 pages, RIMS Set Theory Workshop: Mathematical Logic and Its Applications . September 26-29, 2016, Kyoto University, Japan.
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