3,013 research outputs found
All flat manifolds are cusps of hyperbolic orbifolds
We show that all closed flat n-manifolds are diffeomorphic to a cusp
cross-section in a finite volume hyperbolic (n+1)-orbifold.Comment: Published by Algebraic and Geometric Topology at
http://www.maths.warwick.ac.uk/agt/AGTVol2/agt-2-13.abs.htm
The Dynastinae (Coleoptera: Scarabaeidae) of the Cayman Islands (West Indies), with descriptions of Tomarus adoceteus, new species (Pentodontini) and Caymania nitidissima, new genus and species (Phileurini)
The five genera and eight species of dynastine scarabs occurring in the Cayman Islands in the West Indies are reviewed. Two new, endemic species are described from Little Cayman, with supporting illustrations: Tomarus adoceteus Ratcliffe and Cave (Pentodontini), new species, and Caymania nitidissima Ratcliffe and Cave (Phileurini), new genus and species
On the geometric boundaries of hyperbolic 4-manifolds
We provide, for hyperbolic and flat 3-manifolds, obstructions to bounding
hyperbolic 4-manifolds, thus resolving in the negative a question of Farrell
and Zdravkovska.Comment: 8 pages. Published copy, also available at
http://www.maths.warwick.ac.uk/gt/GTVol4/paper5.abs.htm
Collisions at infinity in hyperbolic manifolds
For a complete, finite volume real hyperbolic n-manifold M, we investigate
the map between homology of the cusps of M and the homology of . Our main
result provides a proof of a result required in a recent paper of Frigerio,
Lafont, and Sisto
Gluon polarization in the proton
We combine heavy-quark renormalization group arguments with our understanding
of the nucleon's wavefunction to deduce a bound on the gluon polarization Delta
g in the proton. The bound is consistent with the values extracted from spin
experiments at COMPASS and RHIC.Comment: 4 page
New species of \u3ci\u3eOrizabus\u3c/i\u3e Fairmaire (Coleoptera: Scarabaeidae: Dynastinae: Pentodontini) from Mexico and Guatemala, with a revised key and checklist of the species in the genus
Five new species of Orizabus Fairmaire from Mexico and Guatemala are described, illustrated, and compared with other Orizabus species: O. amalgamatus Ratcliffe and Cave, O. delgadoi Ratcliffe and Cave, O. epithecus Ratcliffe and Cave, O. mezclus Ratcliffe and Cave, and O. thomasi Ratcliffe and Cave. An identification key and a checklist of the species in the genus Orizabus are provided
The Dynastinae (Coleoptera: Scarabaeidae) of the Bahamas with a description of a new species of \u3ci\u3eCyclocephala\u3c/i\u3e from Great Inagua Island
The seven genera and 13 species of dynastine scarabs recorded from the Bahamas are reviewed. Two of those species are endemic, including Cyclocephala dolichotarsa Ratcliffe and Cave, new species, described from Great Inagua Island. Eleven species are also known to occur in the USA and/or Cuba. Six species are probably not established based on infrequency of collection
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