M. Thaler, A LIMIT-THEOREM FOR THE PERRON-FROBENIUS OPERATOR OF TRANSFORMATIONS ON [0,1] WITH INDIFFERENT FIXED-POINTS, Israel Journal of Mathematics, 91(1-3), 1995, pp. 111-127
A limit theorem is proved for {Sigma(k=0)(n-1) pk}(infinity)(n=1), whe
re P is the Perron-Frobenius operator associated with transformations
on the unit interval with indifferent fixed points.