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The Geometry of Decoupled Line Driven Winds
Astrophysics and Space Science, 1995Bjorkman & Cassinelli (1993) have proposed a mechanism that is expected to produce strong equatorial focusing of the radiation-driven winds from rapidly-rotating B stars. Here the possibility of the decoupling of the stellar radiation field and the outflow is considered.
John M. Porter, Janet E. Drew
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2010
Point-line geometries are just rank two geometries, and so inherit the concepts of morphism and cover from the last chapter. The symmetry between the two types is broken by the concept of a subspace, which treats points differently from lines. A new graph, the point-collinearity graph, is useful in describing geometric properties.
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Point-line geometries are just rank two geometries, and so inherit the concepts of morphism and cover from the last chapter. The symmetry between the two types is broken by the concept of a subspace, which treats points differently from lines. A new graph, the point-collinearity graph, is useful in describing geometric properties.
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The geometry of the projective line
2004What are geometric objects? On the one hand, curves, surfaces, various geometric structures; on the other, tensor fields, differential operators, Lie group actions. The former objects originated in classical geometry while the latter ones are associated with algebra. Both points of view are legitimate, yet often separated.
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2008
Practical application of geometric algorithms is hindered by data imprecision. One of the primitive elements in geometry is the concept of a line. We investigate what is the right way to model imprecise lines, and present algorithms to compute bounds on the solution to linear programming or vertical extent problems on a set of imprecise lines.
Löffler, Maarten, Kreveld, Marc van
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Practical application of geometric algorithms is hindered by data imprecision. One of the primitive elements in geometry is the concept of a line. We investigate what is the right way to model imprecise lines, and present algorithms to compute bounds on the solution to linear programming or vertical extent problems on a set of imprecise lines.
Löffler, Maarten, Kreveld, Marc van
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On the ordinary line problem in compuational geometry
Nord. J. Comput., 1997Summary: Let \({\mathcal P}\) be a set of \(n\) points in the plane. A connecting line of \({\mathcal P}\) is a line that passes through at least two of its points. A connecting line is called ordinary if it is incident on exactly two points of \({\mathcal P}\). If the points of \({\mathcal P}\) are not collinear then such a line exists. In fact, there
Asish Mukhopadhyay +2 more
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On the geometry of the consumer’s surplus line integral [PDF]
Economics Bulletin, 2008 Consumer's surplus can be seen as a correct measure of the change in welfare under special conditions on the preferences of the consumer. The note addresses the question whether the intuitive appeal of the consumer''s surplus concept in the one-price change case extends into cases where several prices of inter-related goods change.
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