On streams that are finitely red
  Mixing induction and coinduction, we study alternative definitions of streams being finitely red. We organize our definitions into a hierarchy including also some well-known alternatives in intuitionistic analysis. The hierarchy collapses classically, but is intuitionistically of strictly decreasing strength. We characterize the differences in strength in a precise way by weak instances of the Law of Excluded Middle. 
Marc Bezem (Department of Informatics, University of Bergen), Keiko   Nakata (Institute of Cybernetics at Tallinn University...
cs.LO