On examples of difference operators for $\{0,1\}$-valued functions over   finite sets
  Recently V.I.Arnold have formulated a geometrical concept of monads and apply it to the study of difference operators on the sets of $\{0,1\}$-valued sequences of length $n$. In the present note we show particular examples of these monads and indicate one question arising here. 
Oleg Karpenkov