Cosmological constant, information and gedanken experiments with black
  hole horizons
  The cosmological constant if considered as a fundamental constant, provides
an information treatment for gravitation problems, both cosmological and of
black holes. The efficiency of that approach is shown via gedanken experiments
for the information behavior of the horizons for Schwarzschild-de Sitter and
Kerr-de Sitter metrics. A notion of entropy regarding any observer and in all
possible non-extreme black hole solutions is suggested, linked also to
Bekenstein bound. The suggested information approach forbids the existence of
naked singularities.
