20,892 research outputs found
Cellularity of Cyclotomic Birman--Wenzl--Murakami algebras
We show that the cyclotomic Birman-Wenzl-Murakami algebras are cellular by
producing a cellular basis of affine tangle diagrams.Comment: Minor corrections, added figur
Why punish hate?
An excerpt from chapter 7 of Professor Frederick M. Lawrence’s book Punishing hate: bias crimes under American law, considering the often controversial debate over the treatment in law of crimes motivated by racial hatred and the wider issue of punishment theory. Article by Professor Frederick M. Lawrence (Boston University, USA). Published in Amicus Curiae - Journal of the Institute of Advanced Legal Studies and its Society for Advanced Legal Studies. The Journal is produced by the Society for Advanced Legal Studies at the Institute of Advanced Legal Studies, University of London
A Revised Parallax and its Implications for RX J185635-3754
New astrometric analysis of four WFPC2 images of the isolated neutron star RX
J185635-3754 show that its distance is 117 +/- 12 pc, nearly double the
originally published distance. At the revised distance, the star's age is 5 x
10^5 years, its space velocity is about 185 km/s, and its radiation radius
inferred from thermal emission is approximately 15 km, in the range of many
equations of state both with and without exotic matter. These measurements
remove observational support for an extremely soft equation of state. The
star's birthplace is still likely to be in the Upper Sco association, but a
connection with zeta Oph is now unlikely.Comment: submitted to ApJ Letter
The Intersection of Law and Trade in the WTO System: Economics and the Transition to a Hard Law System
International Relations/Trade,
Iwahori-Hecke algebras of type A at roots of unity
In this paper, we explore the use of path idempotents for the Hecke algebra
of type at roots of unity. For a primitive -th root of unity we
obain a non-unital imbedding of (a quotient of) the group algebra of into
(a quotient of) the Hecke algebra for certain and . From this
we recover certain instances of irreducibility criteria of Dipper, James, and
Mathas, and we derive estimates on the decomposition numbers for the Hecke
algebra at roots of unity. The bounds are easily computed, provide a good
geometric picture of the pairs of diagrams , for which the
decomposition number is non-zero, and also appers to be a
useful adjunct to the exact computation of the decomposition numbers.Comment: **Second** substantial revision of previously submitted manuscript.
38 pages, TeX, with figures in EPS, requires macro BoxedEP
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