Article: On concircular structure spacetimes.

Article: On concircular structure spacetimes II.
American Journal of Applied Sciences;  April 1, 2006 ;     700+ words ... ... the characteristic vector field of the manifold ... unit concircular vector field, there exists a ... timelike concircular vector field [xi], its associated ... to be a Lorentzian concircular structure manifold (briefly ...

Article: French Inventors Develop Motion Vector Field ...
US Fed News Service, Including US State News;  October 31, 2007 ;     445 words ... ... Verdier of Vern sur Seiche, France, have developed a motion vector field saturation detection method. According to the U.S. Patent ... least one predetermined threshold, and in that the motion vector field is declared saturating if this number is greater than the ...

Dictionary definition: vector field
The Oxford American College Dictionary;      196 words ...vec·tor field • n. Mathematics a function of a space whose value at each point is a vector quantity.

Article: Gravity model for topological features on a cylindrical ...
Progress in Physics;  April 1, 2008 ;     700+ words ... ... dimensionality and consider the dynamics of a vector field defined on a 2-cylinder [R.sup ... manifold. Indeed, the dynamics of the vector field u(x, [tau]) with the initial condition ... where we use the restriction of the vector field onto an arbitrary cylinder's element ...

Article: Fixed point indices and manifolds with collars.
Fixed Point Theory and Applications;  January 1, 2006 ;     700+ words ... ... partial derivative]M. Assume V is a vector field on M with only isolated zeros. If M ... boundary points, then the index of the vector field V equals Euler characteristic of the ... depend on the particular choice of a vector field on M. Morse [15] extended this result ...

Article: Studies conducted at D. Perrone et al on mathematics recently ...
Journal of Mathematics;  August 25, 2009 ;     527 words ... ... Italy, "It is well known that a Hopf vector field on the unit sphere S2n+1 is the Reeb vector field of a natural Sasakian structure on S2n+1. A contact metric manifold whose Reeb vector field. is a harmonic vector field is called ...

Article: New physics findings from Complutense University described.
Physics Week;  November 3, 2009 ;     679 words ... ... terms. We consider the evolution of the vector field throughout the expansion history of ... models according to the behavior of the vector field in each cosmological epoch," scientists ... which the Universe is dominated by the vector field, performing a complete analysis of ...