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If Î“ is a finite co-area Fuchsian group acting on H, then the quotient H2/Î“ is a hyperbolic 2-orbifold, with underlying space an orientable surface (possibly with punctures) and a finite number ofâ€¦ (More)

- David N. Walters, Martin J. Best, +23 authors Keith D. Williams
- 2011

We describe Global Atmosphere 3.0 (GA3.0): a configuration of the Met Office Unified Model (MetUM) developed for use across climate research and weather prediction activities. GA3.0 has beenâ€¦ (More)

- Colin Maclachlan, Alberto Arribas, +10 authors G. Madecb
- 2015

This article describes the UK Met Office Global Seasonal forecast system version 5 (GloSea5). GloSea5 upgrades include an increase in horizontal resolution in the atmosphere (N216â€“0.7â—¦) and the oceanâ€¦ (More)

- David N. Walters, Keith D. Williams, +25 authors P. L. Vidale
- 2014

We describe Global Atmosphere 4.0 (GA4.0) and Global Land 4.0 (GL4.0): configurations of the Met Office Unified Model and JULES (Joint UK Land Environment Simulator) community land surface modelâ€¦ (More)

- Glorian Sorensen, Richard A Youngstrom, +4 authors Charles C Levenstein
- Journal of public health policy
- 1997

Although worksite smoking restrictions have become increasingly common in recent years, organized labor has generally not been involved in the adoption of these policies; some evidence suggests thatâ€¦ (More)

Let G be a co-compact Fuchsian group. As such, it acts discontinuously on the hyperbolic plane H and the quotient is a closed hyperbolic 2-orbifold. The structure theory for co-compact Fuchsianâ€¦ (More)

The Coxeter simplex with symbol is a compact hyperbolic 4-simplex and the related Coxeter group Î“ is a discrete subgroup of Isom(H 4). The Coxeter simplex with symbol is a spherical 3-simplex, andâ€¦ (More)

We prove the existence of a compact non-orientable hyperbolic 4-manifold of volume 32Ï€2/3 and a compact orientable hyperbolic 4-manifold of volume 64Ï€2/3, obtainable from torsion-free subgroups ofâ€¦ (More)

- Colin Maclachlan
- Groups Complexity Cryptology
- 2009

In [1], Borel discussed discrete arithmetic groups arising from quaternion algebras over number fields with particular reference to arithmetic Kleinian and arithmetic Fuchsian groups. In these cases,â€¦ (More)

A Shimura surface is the quotient of either the product HÃ—H of two hyperbolic planes or the unit ball HC in C by an irreducible arithmetic lattice. Examples include the normal quasiprojectiveâ€¦ (More)