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Enumeration of closed random walks in the square lattice according to their areas
Enumeration of closed random square lattice
2011/2/22
We study the area distribution of closed walks of length n, begin-ning and ending at the origin. The concept of area of a walk in the square lattice is generalized and the usefulness of the new concep...
Classification of spatially homogeneous rotating space-times according to their conformal vector fields
Direct integration technique Conformal vector field
2010/9/13
Direct integration technique is used to study non conformally flat spatially homogeneous rotating space-times according to their conformal vector fields. It is shown that the above space-times do not ...
Ranking the stocks listed on Bovespa according to their relative efficiency
Algorithmic complexity theory Econophysics Financial efficiency
2010/9/15
A methodology based on the algorithmic complexity theory has been applied to assess the relative efficiency of the stocks listed on Bovespa. We provide eight alternative listings of the top ten stocks...
Classi¯cation of cylindrically symmetric static space-times according to their proper homothetic vector ¯elds
proper homothetic vector ¯ elds direct integration technique
2009/1/7
A complete classi¯cation of cylindrically symmetric static space-
times according to their proper homothetic vector ¯eld is given by using
direct integration technique. Using the above men...