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Limits of quotients of bivariate real analytic functions
(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2013-03-01)
Necessary and sufficient conditions for the existence of limits of the form lim (x,y)?(a,b)f(x, y)/g(x, y) are given, under the hypothesis that f and g are real analytic functions near the point (a, b), and g has an isolated ...
Algunos ideales de índice finito en el anillo de Burnside Bp(Cpn)
(Benemérita Universidad Autónoma de Puebla, 2021)
"A finales del siglo XIX, W. Burnside introdujo las ideas de lo que actualmente se conoce como el anillo de Burnside, pero fue Solomon en 1967 en su artículo “The Burnside algebra of a finite group” quien le da la estructura ...
La conjetura de Quillen a través del anillo de Burnside
(2020-03)
“A finales del siglo XIX, William Burnside sentó las bases de lo que actualmente se conoce como anillo de Burnside. Fue hasta 1967 cuando Louis Solomon, en “The Burnside algebra of a finite group” [Sol67], le dio estructura ...
Group actions on 2-categories
(Springer, 2019-05)
We study actions of discrete groups on 2-categories. The motivating examples are actions on the 2-category of representations of finite tensor categories and their relation with the extension theory of tensor categories ...
Two examples of vanishing and squeezing in K1
(State University of New York, 2020-06)
Controlled topology is one of the main tools for proving the isomorphism conjecture concerning the algebraic K-theory of group rings. In this article we dive into this machinery in two examples: when the group is infinite ...
Numerical simulation of the flow around the ahmed vehicle model
(Planta Piloto de Ingeniería Química, 2009-10)
The unsteady flow around the Ahmed vehicle model is numerically solved for a Reynolds number of 4.25 million based on the model length. A viscous and incompressible fluid flow of Newtonian type governed by the Navier-Stokes ...
Patterns in random fractals
(Johns Hopkins University Press, 2020-06)
We characterize the existence of certain geometric configurations in the fractal percolation limit set A in terms of the almost sure dimension of A. Some examples of the configurations we study are: homothetic copies of ...
Best Simultaneous Local Approximation in the Lp Norms
(Taylor & Francis, 2017-06)
We study the behavior of the best simultaneous approximation to two functions from a convex set in Lp spaces, 2<p<∞, on a finite union of intervals when its measure tends to zero. In particular, we give sufficient conditions ...
Products of Positive Operators
(Birkhauser Verlag Ag, 2021-02-22)
On finite dimensional spaces, it is apparent that an operator is the product of two positive operators if and only if it is similar to a positive operator. Here, the class L+2 of bounded operators on separable infinite ...
p-Schatten commutators of projections
(Springer, 2021-02)
Let H= H+⊕ H- be a fixed orthogonal decomposition of the complex separable Hilbert space H in two infinite-dimensional subspaces. We study the geometry of the set Pp of selfadjoint projections in the Banach algebra Ap= { ...