On 01/28/2013 11:19 AM, José Carlos Santos wrote: > On 28-01-2013 15:35, David Bernier wrote: > >>> I found several texts across the Internet stating that the Invariant >>> Subspace problem for Hilbert spaces was solved by Carl Cowen (USA) and >>> Eva Gallardo (Spain). However, each of these texts is written either in >>> Spanish or in Portuguese. This is rather odd, given the importance of >>> the problem. Did anyone around here read something about this subject? >> [...] >> >> I found something similar to what you found. >> >> From the "Real Sociedad Matemática Española" web-site, a 2013 meeting: >> >> "del 21 al 25 de Enero" 21-25 January? >> >> http://www.rsme.es/content/view/1199/1/ > > Interesting. This site is the website of the Royal Spanish Mathematical > Society. It looks serious. > >> I think they mention John von Neumann and the 1930s ... [...]
I found another news story in Spanish, which I understand a little bit. The details I got amount to this:
"en su investigación fue abordar el problema "desde el punto de vista de la variable compleja de la teoría de funciones", ya que este es un teorema "clásico" en teoría de operadores en análisis funcional."
"variable compleja de la teoría de funciones" = complex variables, function theory ?