Results 21 to 30 of about 553,337 (333)

D-branes in Kazama-Suzuki Models [PDF]

, 1997
We investigate boundary states of D-branes wrapped around supersymmetric cycles in Kazama--Suzuki models. We show that the geometry of the D-branes corresponds to a generalisation of calibrated geometry.
Acharya, Alvarez, Becker, Becker, Bershadsky, Blau, Blau, Borel, Figueroa-O'Farrill, Giveon, Harvey, Harvey, Inönü, Ishibashi, Kato, Kazama, Kazama, Kiritsis, Lerche, Morrison, Ooguri, Schweigert, Sonia Stanciu, Strominger, Van, Witten   +25 more
core   +4 more sources

Tris(ethylenediamine-κ2N,N′)nickel(II) bis(dimethyl phosphate)

Acta Crystallographica Section E, 2012
In the title compound, [Ni(C2H8N2)3][O2P(OCH3)2]2, the NiII atom is six-coordinated in a distorted octahedral geometry by six N atoms from three ethylenediamine ligands. The P atoms of the anions adopt a distorted tetrahedral geometry.
Masoud Rafizadeh, Hamid Reza Saadati Moshtaghin, Vahid Amani   +2 more
doaj   +1 more source

Geometry of alternating links on surfaces

Transactions of the American Mathematical Society, 2020
We consider links that are alternating on surfaces embedded in a compact 3-manifold. We show that under mild restrictions, the complement of the link decomposes into simpler pieces, generalising the polyhedral decomposition of alternating links of Menasco.
Howie, Joshua A., Purcell, Jessica S.
openaire   +3 more sources

PRE-SERVICE TEACHERS PERFORMANCE IN GEOMETRY IN THE COLLEGES OF EDUCATION, GHANA

JETEN, 2022
Studies indicate that geometry enables pre-service teachers to link mapping objects in the classroom to real-life situations. Additionally, studies indicated that the proficiency development of the participants is a challenge.
Puotier Zutaah, Marguerite Khakasa Miheso-O’Connor, Samson Rosana Ondigi   +2 more
doaj  

catena-Poly[di-μ3-bromido-hexa-μ2-bromido-dibromidobis(O-methyl pyridine-2-carboximidate-κ2N,N′)pentamercury(II)]

Acta Crystallographica Section E, 2012
The title compound, [Hg5Br10(C7H8N2O)2]n, contains two μ3-bridging Br atoms, six μ2-bridging Br atoms and two terminal Br atoms. One HgII atom, lying on an inversion center, adopts a distorted octahedral geometry defined by six Br atoms.
Sadif A. Shirvan, Moayad Hossaini Sadr
doaj   +1 more source

Geometry of biperiodic alternating links

Journal of the London Mathematical Society, 2018
A biperiodic alternating link has an alternating quotient link in the thickened torus. In this paper, we focus on semi-regular links, a class of biperiodic alternating links whose hyperbolic structure can be immediately determined from a corresponding Euclidean tiling. Consequently, we determine the exact volumes of semi-regular links.
Champanerkar, Abhijit, Kofman, Ilya, Purcell, Jessica S.   +2 more
openaire   +4 more sources

Diiodido{2-(morpholin-4-yl)-N-[1-(2-pyridyl)ethylidene]ethanamine-κ3N,N′,N′′}zinc

Acta Crystallographica Section E, 2011
In the title compound, [ZnI2(C13H19N3O)], the ZnII ion is five-coordinated in a distorted square-pyramidal geometry, in which the basal plane is defined by three N atoms from the Schiff base ligand and one iodide ion.
Nura Suleiman Gwaram, Hamid Khaledi, Hapipah Mohd Ali   +2 more
doaj   +1 more source

2-(5-Bromo-2-methylphenyl)propan-2-ol

Acta Crystallographica Section E, 2010
The title compound, C10H13BrO, crystallizes with four independent molecules of similar geometry in the asymmetric unit. The crystal packing is stabilized by intermolecular O—H...O hydrogen bonds, which link the molecules into tetramers.
Hui Zeng, Xin-Lin Liu
doaj   +1 more source

The size of triangulations supporting a given link [PDF]

, 2000
Let T be a triangulation of S^3 containing a link L in its 1-skeleton. We give an explicit lower bound for the number of tetrahedra of T in terms of the bridge number of L.
Armentrout, Burde, Furch, Gabai, Goodrick, Haken, Hemion, Kneser, Lickorish, Matveev, Mijatović, Rubinstein, Scharlemann, Schrijver, Simon A King, Thompson   +15 more
core   +5 more sources

Bis(μ2-quinoline-2-carboxylato)-κ3N,O1:O1;κ3O1:N,O1-bis[(acetato-κO)(ethanol-κO)lead(II)]

Acta Crystallographica Section E, 2011
In the centrosymmetric dinuclear title compound, [Pb2(C10H6NO2)2(CH3COO)2(C2H5OH)2], one O atom of the carboxylate group of the quinoline-2-carboxylate anion connects the two PbII atoms.
Ezzatollah Najafi, Mostafa M. Amini, Seik Weng Ng   +2 more
doaj   +1 more source