Seifert fiber space
In the field of three dimensional manifolds there is a kind which can be considered as spaces which are fibered by circles (http://planetmath.org/Circle), that is, for each point in the space there is a unique circle (a homeomorph of ) which contains it.
To construct them one must begin learning how to fiber a solid torus. Naturally a solid torus is foliated by circles where .
To get different fibered solid tori one must begin with a solid torus , cut it along a meridian disk and twist the resulting solid cylinder by a rational angle (being coprime) and reglue to obtain a new fibering by circles of the old torus, where the fibers all are still longitudinal circles but differs by the previous one in the fact that now only the center’s disk is a trivial circle but any other point in the disk is in a circle which is times longer that the central one.
It is possible construct an associated 2-manifold identifying each fiber to a point to get the so called orbit surface.
H. Seifert,Topologie drei-dimensionaler gefaserter Räume, Acta. Math. 60 (1933), 147 - 238.
M.Brin, Seifert Fibered Spaces, Notes for a course given in the Spring of 1993, on line at ftp://ftp.math.binghamton.edu/pub/matt/seifert.pdf
|Title||Seifert fiber space|
|Date of creation||2013-03-22 15:50:53|
|Last modified on||2013-03-22 15:50:53|
|Last modified by||juanman (12619)|