Estimadas/os compañeras y compañeros.
Tenemos el agrado de invitarles a la exposición de Álvaro Bustos (DIM) en el seminario de doctorantes. Esta se llevará a cabo el día martes 23 de Marzo a las 14:30 hrs vía Zoom.
La charla se titula: Automorphisms and extended symmetries of number-theoretic positive entropy subshifts.
Resumen: We will discuss one- and multidimensional subshifts constructed via number-theoretically defined subsets of the integers (e.g. the visible lattice points in the plane, k-free integers, etc.), focusing our interest on their groups of automorphisms and extended symmetries, which are naturally defined conjugacy invariants. This type of shift space exhibits symmetry rigidity (that is, its group of automorphisms is essentially trivial), but is compatible with positive entropy and shows interesting variations on their extended symmetry groups, which may be small (finite) or large extensions of the corresponding automorphism group; we show examples of each of these behaviors, which come from real and imaginary quadratic number fields.
Link:
https://uchile.zoom.us/j/82919875247?pwd=eWNhU0t2WFhrSnIyNmtrdWo3RUJxdz09
Código de acceso: 206782
Esperando que seamos numerosos,
Seminario de doctorantes.