Social norms help people self-organizing in many situations where having an authority representative is not feasible. On the contrary to institutional rules, the responsibility to enforce social norms is not the task of a central authority but a task of each member of the society. “The social norms I am talking about are not the formal, prescriptive or proscriptive rules designed, imposed, and ...

in this paper we obtain lower and upper estimates for the essential norms of generalized composition operators from weighted dirichlet spaces or bloch type spaces to $q_k$ type spaces.

In this paper we obtain lower and upper estimates for the essential norms of generalized composition operators from weighted Dirichlet spaces or Bloch type spaces to $Q_K$ type spaces.

It is well known that the essential norm of a Toeplitz operator on Hardy space Hp(T), 1<p<∞ greater than or equal to L∞(T) its symbol. In 1988, A. Böttcher, N. Krupnik, and B. Silbermann posed question whether not equality holds in case continuous symbols. We answer this negative. On other hand, we show T(a) with symbol less 2|1−2p|‖a‖L∞.