Results 1 to 10 of about 344,090 (225)
On Star Selection Principles Theory
Axioms, 2023 The aim of this paper is to review up-to-date recent results in the field of star selection principles, a rapidly growing area of topology, and to present a few new results.
Ljubiša D. R. Kočinac
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Absolutely strongly star-Hurewicz spaces
Open Mathematics, 2015 A space X is absolutely strongly star-Hurewicz if for each sequence (Un :n ∈ℕ/ of open covers of X and each dense subset D of X, there exists a sequence (Fn :n ∈ℕ/ of finite subsets of D such that for each x ∈X, x ∈St(Fn; Un) for all but finitely many n.
Song Yan-Kui
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Attraction and Repulsion Factors of Tourism Destinations with Emphasis on Inbound French Cultural Tourists’ Experiences in Iran [PDF]
برنامه ریزی فضایی, 2022 Choosing a tourist destination is a complex process and could be affected by various factors. Some of these factors depend on the destination and its characteristics.
AhmadReza Sheikhi, Morteza Kowsari
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Frontiers in Nutrition, 2022 Background:Nutrient criteria underlying front-of-pack food labeling programs can play an important role in improving dietary intakes. Currently, no methodology for the development or update of nutrient criteria has been published, nor the methods used by
Carlene Starck +8 more
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Selection principles and covering properties in bitopological spaces
Applied General Topology, 2020 Our main focus in this paper is to introduce and study various selection principles in bitopological spaces. In particular, Menger type, and Hurewicz type covering properties like: Almost p-Menger, star p-Menger, strongly star p-Menger, weakly p-Hurewicz,
Moiz ud Din Khan, Amani Sabah
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Star-Hurewicz and related properties
Applied General Topology, 2004 We continue the investigation of star selection principles first considered. We are concentrated onto star versions of the Hurewicz covering property and star selection principles related to the classes of open covers which have been recently introduced.
M. Bonanzinga +2 more
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The Cosmic Coincidence as a Temporal Selection Effect Produced by the Age Distribution of Terrestrial Planets in the Universe [PDF]
, 2007 The energy densities of matter and the vacuum are currently observed to be of the same order of magnitude: $(\Omega_{m 0} \approx 0.3) \sim (\Omega_{\Lambda 0} \approx 0.7)$.
Carroll S. M. +6 more
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Crowdfunding Astronomy Research with Google Sky [PDF]
, 2015 For nearly four years, NASA's Kepler space telescope searched for planets like Earth around more than 150,000 stars similar to the Sun. In 2008 with in-kind support from several technology companies, our non-profit organization established the Pale Blue ...
Metcalfe, Travis S.
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GravityCam: higher resolution visible wide-field imaging [PDF]
, 2018 The limits to the angular resolution has, during the latest 70 years, been obtainable from the ground only through extremely expensive adaptive optics facilities at large telescopes, and covering extremely small spatial areas per exposure.
Downing +7 more
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Faint star counts in the near-infrared [PDF]
, 2002 We discuss near-infrared star counts at the Galactic pole with a view to guiding the NGST and ground-based NIR cameras. Star counts from deep K-band images from the CFHT are presented, and compared with results from the 2MASS survey and some Galaxy ...
Hutchings, J. B. +3 more
core +3 more sources