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): Macro Closures in Open Economy CGE Models: A Numerical Reappraisal . International Journal of Development Planning Literature, 3 ( 2 ): 69 – 90 . Dervis , K. — de Melo , J

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Abstract  

Closure algebras have been intensively studied in literature ([2], [3], [11], ...) but, up to now, little interest has been devoted to subalgebras of closure algebras. In this paper, the methods of [16] are adapted to characterize closure algebras with a distributive, or a Boolean, subalgebra lattice.

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Abstract  

We define two closure operators of some well-known topological categories and investigate the relationships between these closure operators and the one that is given in [9]. As a consequence, we characterize separation properties T 0, T 1, and T 2 for these well-known categories and compare them with the ones that are given in [3] and [6]. Finally, we characterize the epimorphisms in the subcategories of these given categories.

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maintenance of hemostasis after arterial endovascular treatment is critical [ 1 ]. The gold standard for achieving the maintenance of hemostasis following extra femoral catheterization is manual compression. However, given the proliferation of vascular closure

Open access
Orvosi Hetilap
Authors:
Zsuzsanna Kis
,
Csaba Földesi
,
Mátyás Pál
,
Zoltán Som
,
Andrea Csillik
,
Pál Ábrahám
,
András Temesvári
,
Géza Fontos
,
András Szatmári
,
Péter Andréka
, and
Attila Kardos

Holmes, D. R., Reddy, V. Y., Turi, Z. G., et al.: Percutaneous closure of the left atrial appendage versus warfarin therapy for prevention of stroke in patients with atrial fibrillation: a randomised non-inferiority trial. Lancet, 2009, 374 , 534

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Abstract  

Notions of strongly and absolutely closed objects with respect to a closure operator X on an arbitrary category X and with respect to a subcategory Y are introduced. This yields two Galois connections between closure operators on a given category X and subclasses of X, whose fixed points are studied. A relationship with some compactness notions is shown and examples are provided.

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1419 Sievert, H., Bayard, Y. L.: Percutaneous closure of left atrial appendage, a major step forward. Editorial comment. J. Am. Coll. Cardiol. Card. Int., 2009, 7 , 601

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We consider the question of whether a compact space will always have a discrete subset whose closure has the same cardinality as the whole space. We obtain many positive results for compact spaces of countable tightness and a consistent negative result for a space of tightness and density ?1.

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://www.ipni.org [accessed 5 March 2012] Jennings, S. B., Brown N. D. and Sheil, D. 1999. Assessing forest canopies and understory illumination: Canopy closure, canopy cover and other measures. Forestry 72: 59

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Abstract  

We introduce and study a concept of neighborhoods with respect to a categorical closure operator. The concept, which is based on using pseudocomplements in subobject lattices, naturally generalizes the classical neighborhoods in topological spaces and we show that it behaves accordingly. We investigate also separation and compactness defined in a natural way by the help of the neighboorhoods introduced.

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