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Irreducible characters taking root of unity values on p-singular elements
Irreducible characters unity values on p-singular elements
2011/1/20
In this paper we study finite p-solvable groups having irreducible com-plex characters χ ∈ Irr(G) which take roots of unity values on the p-singular elements of G.
On Perron's unit root tests in the presence of an innovation variance break
Unit Root Trend Break Innovation Break Break Date
2010/9/14
The unit root tests of Perron (1989, Econometrica) were designed to have power against the stationary alternative characterized by a break in the trend function. We show that all versions of Perron’s ...
Modified Lagrangian and Least Root Approaches for General Nonlinear Optimization Problems
Generalized Lagrangian Zero duality gap least root approach
2007/12/11
In this paper we study nonlinear Lagrangian methods for optimization problems with side constraints. Nonlinear Lagrangian dual problems are introduced and their relations with the original problem are...