Now showing items 2-8 of 8

    • CONTINUOUS AND DISCRETE FLOWS ON OPERATOR ALGEBRAS 

      Itzá Ortiz, Benjamín Alfonso (2009)
      Let (N, R, ) be a centrally ergodic W* dynamical system. When N is not a factor, we show that, for each t 6= 0, the crossed product induced by the time t automorphism t is not a factor if and only if there exist a rational ...
    • D-Branes in Orientifolds and Orbifolds and Kasparov KK-Theory 

      Itzá Ortiz, Benjamín Alfonso (2008)
      A classification of D-branes in Type IIB Op? orientifolds and orbifolds in terms of Real and equivariant KK-groups is given. We classify D-branes intersecting orientifold planes from which are recovered some special limits ...
    • Eigenvalues, K-theory and Minimal Flows 

      Itzá Ortiz, Benjamín Alfonso (2007)
      Let (Y, T) be a minimal suspension flow built over a dynamical system (X, S) and with (strictly positive, continuous) ceiling function f : X ! R. We show that the eigenvalues of (Y, T) are contained in the range of a trace ...
    • Math Processing 

      Rodríguez Torres, Erika Elizabeth (2002)
    • Matrix Completion Problem 

      Guillén Morales, Jhovany (2012)
    • REALIZATION OF A SIMPLE HIGHER DIMENSIONAL NONCOMMUTATIVE TORUS AS A TRANSFORMATION GROUP C*-ALGEBRA 

      Itzá Ortiz, Benjamín Alfonso (2008)
      Let be a nondegenerate skew symmetric real d × d matrix, and let A be the corresponding simple higher dimensional noncommutative torus. Suppose that d is odd, or that d 4 and the entries of are not contained in a quadratic ...
    • THE C*-ALGEBRAS ASSOCIATED TO TIME-t AUTOMORPHISMS OF MAPPING TORI 

      Itzá Ortiz, Benjamín Alfonso (2006)
      We find the range of a trace on the K0 group of a crossed product by a time-t automorphism of a mapping torus. We also find a formula to compute the Voiculescu-Brown entropy for such an automorphism. By specializing to the ...