In this article we provide an algebraic characterization of the subgroups of PSL(3,C) for which the maximum number of complex lines in general position contained in its limit set, according to Kulkarni, is equal to four. Also, we give an explicit description of the discontinuity region, according to Kulkarni, of such groups.

GRK — the Grammar Recovery Kit — illustrates options for automation and corresponding tool support in the context of developing quality language references that readily cater for the derivation of parsers. GRK provides the proof-of-concept for two notions: (i) semi-automatic grammar recovery; (ii) language-reference re-engineering. GRK’s support for semi-automatic grammar recovery means that GR...

We present a technique for automatically generating features for data-driven program analyses. Recently data-driven approaches for building a program analysis have been proposed, which mine existing codebases and automatically learn heuristics for finding a cost-effective abstraction for a given analysis task. Such approaches reduce the burden of the analysis designers, but they do not remove i...

In this paper we investigate the relationship between market structure and the composition of R&D activities. We present an empirical model to demonstrate that when market structure is shuffled by an institutional discontinuity, such as liberalisation, basic and applied activities respond in opposite ways: the former decrease whereas the latter increase. As a consequence, market turmoil is like...

We propose a computationai modei for interpreting iine drawings as three-dimensionai surfaces, based on constraints on iocai surface orientation aiong extremai and discontinuity boundaries. Specific techniques are described for two key processes: recovering the threedimensionai conformation of a space curve (e.g., a surface boundary) from its two-dimensionai projection in an image, and interpoi...

Using data from China's Urban Household Survey and exploiting China's mandatory retirement policy, we use the regression discontinuity approach to estimate the impact of retirement on household expenditures. Retirement reduces total non-durable expenditures by 21 percent. Among the categories of non-durable expenditures, retirement reduces work-related expenditures and expenditures on food cons...

control strategies for these codes. We have developed a parameterizable benchmark called MOL that captures a wide range of realistic Method-of-Lines codes. We are using this benchmark to develop performance models that can be used to achieve specific optimality criteria under the available (and

The method of lines (MOL), a semianalytical procedure, is well known to experts in computational techniques in electromagnetics. The range of applications of the method has increased dramatically in the past few years; nevertheless, there is no introductory paper to initiate a beginner to the method. This paper illustrates the application of the MOL to solve Laplace’s equation in rectangular an...

In this paper we describe a final-year undergraduate honours course that requires multimedia computing students to create narrative auditory and visual displays. The aim was to use discontinuity as a catalyst for creativity by getting students to tell a story in non-speech sound and in vision in which each medium conveyed a different mood.