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・ Line Delimited JSON
・ Line Describing a Cone
・ Line discipline
・ Line doubler
・ Line drawing
・ Line drawing algorithm
・ Line drive
・ Line driver
・ Line E (Buenos Aires Underground)
・ Line echo wave pattern
・ Line editor
・ Line element
・ Line Engaged
・ Line engraving
・ Line F (Buenos Aires Underground)
Line field
・ Line filter
・ Line fitting
・ Line Focus Principle
・ Line function
・ Line G (Buenos Aires Underground)
・ Line graph
・ Line graph of a hypergraph
・ Line group
・ Line H (Buenos Aires Underground)
・ Line H7 (Budapest HÉV)
・ Line Haddad
・ Line Hagman
・ Line Halvorsen
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Line field : ウィキペディア英語版
Line field

In mathematics, a line field on a manifold is a formation of a line being tangent to a manifold at each point, i.e. a section of the line bundle over the manifold. Line fields are of particular interest in the study of complex dynamical systems, where it is conventional to modify the definition slightly.
==Definitions==

In general, let ''M'' be a manifold. A line field on ''M'' is a function ''μ'' that assigns to each point ''p'' of ''M'' a line ''μ''(''p'') through the origin in the tangent space T''p''(''M''). Equivalently, one may say that ''μ''(''p'') is an element of the projective tangent space PT''p''(''M''), or that ''μ'' is a section of the projective tangent bundle PT(''M'').
In the study of complex dynamical systems, the manifold ''M'' is taken to be a Hersee surface. A line field on a subset ''A'' of ''M'' (where ''A'' is required to have positive two-dimensional Lebesgue measure) is a line field on ''A'' in the general sense above that is defined almost everywhere in ''A'' and is also a measurable function.


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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