Search results for " covers"

showing 4 items of 4 documents

On hyperbolic type involutions

2001

We give a bound on the number of hyperbolic knots which are double covered by a fixed (non hyperbolic) manifold in terms of the number of tori and of the invariants of the Seifert fibred pieces of its Jaco-Shalen-Johannson decomposition. We also investigate the problem of finding the non hyperbolic knots with the same double cover of a hyperbolic one and give several examples to illustrate the results.

Bonahon-Siebenmann decomposition[ MATH.MATH-GT ] Mathematics [math]/Geometric Topology [math.GT]Seifert fibrationsMathematics::Dynamical Systemscyclic branched coversMathematics::Geometric Topology57M5057M6057M12[MATH.MATH-GT]Mathematics [math]/Geometric Topology [math.GT]57M25orbifoldshyperbolic knots[MATH.MATH-GT] Mathematics [math]/Geometric Topology [math.GT]
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Proteggere e Valorizzare: una buona pratica per i siti archeologici

2014

Tra i beni culturali quelli archeologici hanno più animato il dibattito culturale sul rapporto tra conservazione e loro messa in valore. La fragilità con cui la materia ci viene consegnata dalla storia, la frammentarietà del reperto, la scarsa disponibilità di risorse finanziarie, anche in relazione alla vastità del patrimonio a noi pervenuto, impongono interventi mirati e talvolta urgenti per la salvaguardia e la conservazione dei beni archeologici. Ma la sola conservazione non può però costituire l’obiettivo ultimo dell’intervento: poiché i beni archeologici rappresentano il nostro lontano passato è anche necessario recuperarne il valore e comunicarne l’identità. La conoscenza storica, st…

archaeological sites covers protective systems code of practicesiti archeologici coperture sistemi di protezione codice di praticaSettore ICAR/12 - Tecnologia Dell'Architettura
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Primeras consideraciones a la Ley Orga?nica 3/2021, de 24 de marzo, de regulación de la eutanasia. el reconocimiento de un nuevo derecho

2021

The aim of this paper is to carry out a brief study of the recent Organic Law 3/2021, of March 24, on the regulation of euthanasia (BOE. March 25, 2021) approved in Spain, from a constitutional perspective, highlighting its main aspects. The matter under study is not exempt from controversy because it covers legal, medical and ethical considerations of great complexity.

:CIENCIAS JURÍDICAS [UNESCO]suicidio asistidolifeassisted suicidederechosdespenalizaciónCuthanasiaof March 24de 24 de marzode regulación de la eutanasia. el reconocimiento de un nuevo derecho Agut Garcíahighlighting its main aspects. The matter under study is not exempt from controversy because it covers legalvidaon the regulation of euthanasia (BOE. March 25UNESCO::CIENCIAS JURÍDICASdeath2021) approved in Spainrightsmuertedecriminalization 980 995María Teresa The aim of this paper is to carry out a brief study of the recent Organic Law 3/20212070-8157 22082 Revista Boliviana de Derecho 584568 2021 32 8055245 Primeras consideraciones a la Ley Orga?nica 3/2021from a constitutional perspectivemedical and ethical considerations of great complexity. Eutanasia
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Non-equivalent hyperbolic knots

2002

We construct, for each integer n 3, pairs of non-equivalent hyperbolic knots with the same 2fold and n-fold cyclic branched covers. We also discuss necessary conditions for such pairs of knots to exist.  2001 Elsevier Science B.V. All rights reserved. MSC: primary 57M25; secondary 57M12, 57M50

Hyperbolic knotsPure mathematicsQuantitative Biology::BiomoleculesCyclic branched coversHyperbolic groupSkein relationHyperbolic 3-manifoldOrbifoldsHyperbolic manifoldVolume conjectureMathematics::Geometric TopologyBonahon–Siebenmann decompositionKnot theoryAlgebraIntegerGeometry and TopologyMathematicsTopology and its Applications
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