Results 291 to 300 of about 1,470,168 (332)
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Line geometries for sequence comparisons
Bulletin of Mathematical Biology, 1984Well-known dynamic programming algorithms exist for comparing two finite sequences inO(N 2) time and storage, whereN is the common sequence length. Extensions to the comparison ofM finite sequences requireO((2N) M) time and storage, making such algorithms difficult even forM=3.
Michael S. Waterman, Marcela D. Perlwitz
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Geological Society, London, Special Publications, 2016
Abstract A branch line is the line of intersection between two hard-linked fault planes, or between two parts of a single fault plane of more complex geometry. Of interest is whether they provide any information about the kinematic development of the fault system to which they belong.
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Abstract A branch line is the line of intersection between two hard-linked fault planes, or between two parts of a single fault plane of more complex geometry. Of interest is whether they provide any information about the kinematic development of the fault system to which they belong.
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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.
S. Tabachnikov, V. Ovsienko
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An introduction to line geometry with applications
Computer-Aided Design, 1999Abstract The article presents a brief tutorial on classical line geometry and investigates new aspects of line geometry which arise in connection with a computational treatment. These mainly concern approximation and interpolation problems in the set of lines or line segments in Euclidean three-space. In particular, we study the approximation of data
Martin Peternell +2 more
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Complex Curves as Lines of Geometries [PDF]
Results in Mathematics, 2016 We investigate Hjelmslev geometries \({\mathcal{H}}\) having a representation in a complex affine space \({\mathbb{C}^n}\) the lines of which are given by entire functions. If \({\mathcal{H}}\) has dimension 2 and the entire functions satisfy some injectivity conditions, then \({\mathcal{H}}\) is a substructure of the complex Laguerre plane.
Josef Mikeš +2 more
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On point-line geometry and displacement
Mechanism and Machine Theory, 2004A framework and the relevant algebraic treatment concerning point-line positions and displacements are explored using dual quaternion algebra. A screw or a dual vector is used to represent a point-line and the pitch is used to measure the endpoint location along the point-line.
Kwun-Lon Ting, Yi Zhang
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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 Straight Line Figures
1991We have seen that the step from arithmetic to algebra is merely the transference of the rules of numbers to letters, which, in a sense, makes algebra more abstract than arithmetic. But this difference is more apparent than real because numbers are abstractions also unless we associate them with measurable entities. Since a measurement is never precise,
Jefferson Hane Weaver, Lloyd Motz
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Spinor Space and Line Geometry
Canadian Journal of Mathematics, 1951Synopsis. This is the first of two papers dealing with the projective theory of spinors. It contains the algebraic introduction to the projective spinor analysis which will be dealt with in the second paper.
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