منابع مشابه
Liaison Linkages
The complete classification of hexapods — also known as Stewart Gough platforms — of mobility one is still open. To tackle this problem, we can associate to each hexapod of mobility one an algebraic curve, called the configuration curve. In this paper we establish an upper bound for the degree of this curve, assuming the hexapod is general enough. Moreover, we provide a construction of hexapods...
متن کاملLiaison Addition and the Structure of a Gorenstein Liaison Class
We study the concept of liaison addition for codimension two subschemes of an arithmetically Gorenstein projective scheme. We show how it relates to liaison and biliaison classes of subschemes and use it to investigate the structure of Gorenstein liaison equivalence classes, extending the known theory for complete intersection liaison of codimension two subschemes. In particular, we show that o...
متن کاملLiaison Classes of Modules
We propose a concept of module liaison that extends Gorenstein liaison of ideals and provides an equivalence relation among unmixed modules over a commutative Gorenstein ring. Analyzing the resulting equivalence classes we show that several results known for Gorenstein liaison are still true in the more general case of module liaison. In particular, we construct two maps from the set of even li...
متن کاملExperiments with Gorenstein Liaison
We give some experimental data of Gorenstein liaison, working with points in P and curves in P , to see how far the familiar situation of liaison, biliaison, and Rao modules of curves in P will extend to subvarieties of codimension 3 in higher P . AMS classification numbers: 14H50, 14M07
متن کاملLiverpool Police Liaison Scheme
Chief Inspector Cottam told us about the scheme; he had been in at its inception nine years ago under Sir Charles Martin. At this time research showed that 40 per cent of all children appearing before the Liverpool Juvenile Courts had previous police records. This fact and the heavy increase in juvenile crime generally, finally decided the police to start an experiment which was to be a system ...
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ژورنال
عنوان ژورنال: British Journal of Psychiatry
سال: 1989
ISSN: 0007-1250,1472-1465
DOI: 10.1192/bjp.155.1.127c