Search results for "FOS"

showing 10 items of 15075 documents

Projective models of K3 surfaces with an even set

2006

The aim of this paper is to describe algebraic K3 surfaces with an even set of rational curves or of nodes. Their minimal possible Picard number is nine. We completely classify these K3 surfaces and after a carefull analysis of the divisors contained in the Picard lattice we study their projective models, giving necessary and sufficient conditions to have an even set. Moreover we investigate their relation with K3 surfaces with a Nikulin involution.

14J28 14J10 14E20Discrete mathematicsMathematics - Algebraic GeometryPure mathematicsMathematics::Algebraic GeometryFOS: MathematicsGeometry and TopologyProjective testAlgebraic numberAlgebraic Geometry (math.AG)Twisted cubicMathematicsadvg

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New fourfolds from F-theory

2015

In this paper, we apply Borcea-Voisin's construction and give new examples of fourfolds containing a del Pezzo surface of degree six, which admit an elliptic fibration on a smooth threefold. Some of these fourfolds are Calabi-Yau varieties, which are relevant for the $N=1$ compactification of Type IIB string theory known as $F$-Theory. As a by-product, we provide a new example of a Calabi--Yau threefold with Hodge numbers $h^{1,1}=h^{2,1}=10$.

14J50F-theory14J32del Pezzo surface14J32; 14J35; 14J50; Calabi-Yau manifolds; Del Pezzo surfaces; Elliptic fibration; F-theory; Mathematics (all)Calabi-Yau manifoldMathematics - Algebraic GeometryCalabi-Yau manifoldsFOS: MathematicsMathematics (all)14J35Settore MAT/03 - Geometriaelliptic fibrationDel Pezzo surfaces14J32 14J35 14J50Algebraic Geometry (math.AG)

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Moduli spaces of rank two aCM bundles on the Segre product of three projective lines

2016

Let P^n be the projective space of dimension n on an algebraically closed field of characteristic 0 and F be the image of the Segre embedding of P^1xP^1xP^1 inside P^7. In the present paper we deal with the moduli spaces of locally free sheaves E on F of rank 2 with h^i(F,E(t))=0 for i=1,2 and each integer t.

14J60 14J45 14D20[MATH.MATH-AC]Mathematics [math]/Commutative Algebra [math.AC]Rank (differential topology)Commutative Algebra (math.AC)01 natural sciences[ MATH.MATH-AC ] Mathematics [math]/Commutative Algebra [math.AC]CombinatoricsMathematics - Algebraic GeometryMathematics::Algebraic Geometry0103 physical sciencesFOS: Mathematics0101 mathematicsProjective testAlgebraic Geometry (math.AG)MathematicsAlgebra and Number TheoryImage (category theory)010102 general mathematicsMathematics - Commutative Algebra16. Peace & justice[ MATH.MATH-AG ] Mathematics [math]/Algebraic Geometry [math.AG]Moduli spaceSegre embeddingMSC: Primary: 14J60; secondary: 14J45; 14D20Product (mathematics)[MATH.MATH-AG]Mathematics [math]/Algebraic Geometry [math.AG]010307 mathematical physicsJournal of Pure and Applied Algebra

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RAS869430 Supplemetal Material - Supplemental material for Public administration sustainability and its organizational basis

2019

Supplemental material, RAS869430 Supplemetal Material for Public administration sustainability and its organizational basis by Jarle Trondal in International Review of Administrative Sciences

160509 Public AdministrationFOS: Political science160607 International Relations

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sj-pdf-1-ras-10.1177_00208523211007533 - Supplemental material for Discursive framing and organizational venues: mechanisms of artificial intelligenc…

2021

Supplemental material, sj-pdf-1-ras-10.1177_00208523211007533 for Discursive framing and organizational venues: mechanisms of artificial intelligence policy adoption by Frans af Malmborg Jarle Trondal in International Review of Administrative Sciences

160509 Public AdministrationFOS: Political science160607 International Relations

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sj-pdf-1-ras-10.1177_00208523211007533 - Supplemental material for Discursive framing and organizational venues: mechanisms of artificial intelligenc…

2021

160509 Public AdministrationFOS: Political science160607 International Relations

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First M87 Event Horizon Telescope Results. VII. Polarization of the Ring

2021

Full list of authors: Akiyama, Kazunori; Algaba, Juan Carlos; Alberdi, Antxon; Alef, Walter; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Baloković, Mislav; Barrett, John; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Chesler, Paul M.; Cho, Ilje; Christian, Pierre; Conway, John E.…

1663010504 meteorology & atmospheric sciences1346KinoAstrophysics - astrophysics of galaxiesAstronomyAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesGalaxy accretion disks01 natural sciencesAstrophysics - high energy astrophysical phenomena2033Galaxies: individual: M87 1278 1346 1769 1663 16 2033 1859 5620103 physical sciencesPolarimetrySupermassive black holes1769010303 astronomy & astrophysicsAstronomy data modeling0105 earth and related environmental sciencesVery long baseline interferometryPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Active galactic nucleiGalaxies: individual: M871278F510ChatterjeeAstronomy and AstrophysicsCreative commons16562Low-luminosity active galactic nuclei13. Climate actionSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)Fish <Actinopterygii>Radio interferometryHumanities1859

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Lie Algebras Generated by Extremal Elements

1999

We study Lie algebras generated by extremal elements (i.e., elements spanning inner ideals of L) over a field of characteristic distinct from 2. We prove that any Lie algebra generated by a finite number of extremal elements is finite dimensional. The minimal number of extremal generators for the Lie algebras of type An, Bn (n>2), Cn (n>1), Dn (n>3), En (n=6,7,8), F4 and G2 are shown to be n+1, n+1, 2n, n, 5, 5, and 4 in the respective cases. These results are related to group theoretic ones for the corresponding Chevalley groups.

17B05[ MATH.MATH-GR ] Mathematics [math]/Group Theory [math.GR]Non-associative algebraAdjoint representationGroup Theory (math.GR)01 natural sciences[MATH.MATH-GR]Mathematics [math]/Group Theory [math.GR]Graded Lie algebraCombinatoricsMathematics - Algebraic Geometry0103 physical sciences[MATH.MATH-RA] Mathematics [math]/Rings and Algebras [math.RA]FOS: Mathematics0101 mathematicsAlgebraic Geometry (math.AG)[MATH.MATH-GR] Mathematics [math]/Group Theory [math.GR]MathematicsDiscrete mathematicsAlgebra and Number TheorySimple Lie group010102 general mathematics[MATH.MATH-RA]Mathematics [math]/Rings and Algebras [math.RA]20D06[MATH.MATH-AG] Mathematics [math]/Algebraic Geometry [math.AG]Mathematics - Rings and AlgebrasKilling formAffine Lie algebra[ MATH.MATH-RA ] Mathematics [math]/Rings and Algebras [math.RA]Lie conformal algebra[ MATH.MATH-AG ] Mathematics [math]/Algebraic Geometry [math.AG]Adjoint representation of a Lie algebraRings and Algebras (math.RA)17B05; 20D06010307 mathematical physics[MATH.MATH-AG]Mathematics [math]/Algebraic Geometry [math.AG]Mathematics - Group TheoryJournal of Algebra

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Introduction to Gestural Similarity in Music. An Application of Category Theory to the Orchestra

2019

Mathematics, and more generally computational sciences, intervene in several aspects of music. Mathematics describes the acoustics of the sounds giving formal tools to physics, and the matter of music itself in terms of compositional structures and strategies. Mathematics can also be applied to the entire making of music, from the score to the performance, connecting compositional structures to acoustical reality of sounds. Moreover, the precise concept of gesture has a decisive role in understanding musical performance. In this paper, we apply some concepts of category theory to compare gestures of orchestral musicians, and to investigate the relationship between orchestra and conductor, a…

18B05 18B10 16D90 03B52InformationSystems_INFORMATIONINTERFACESANDPRESENTATION(e.g.HCI)History and Overview (math.HO)MathematicsofComputing_GENERALvisual artscomputer.software_genreFuzzy logic050105 experimental psychology060404 musicgesture performance orchestral conducting category theory similarity composition visual arts interdisciplinary studies fuzzy logicinterdisciplinary studiesSimilarity (psychology)FOS: Mathematics0501 psychology and cognitive sciencesCategory Theory (math.CT)Category theoryComposition (language)similaritySettore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniSettore INF/01 - Informaticabusiness.industryMathematics - History and OverviewApplied Mathematics05 social sciencesMathematics - Category Theory06 humanities and the artsSettore MAT/04 - Matematiche ComplementariComputational Mathematicscategory theorySettore MAT/02 - AlgebraComputer Science::SoundcompositionModeling and SimulationgestureArtificial intelligencefuzzy logicorchestral conductingbusinesscomputer0604 artsMusicNatural language processingperformanceGesturecategory theory; composition; fuzzy logic; gesture; interdisciplinary studies; orchestral conducting; performance; similarity; visual arts

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Supplemental Material, Appendices_(1) - Is it me or the music? Stress reduction and the role of regulation strategies and music

2019

Supplemental Material, Appendices_(1) for Is it me or the music? Stress reduction and the role of regulation strategies and music by Margarida Baltazar, Daniel Västfjäll, Erkin Asutay, Lina Koppel and Suvi Saarikallio in Music & Science

190406 Music Composition190409 Musicology and Ethnomusicology190407 Music PerformanceFOS: Arts (arts history of arts performing arts music)

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