Combinatorial Solutions to Normal Ordering of Bosons
  We present a combinatorial method of constructing solutions to the normal ordering of boson operators. Generalizations of standard combinatorial notions - the Stirling and Bell numbers, Bell polynomials and Dobinski relations - lead to calculational tools which allow to find explicitly normally ordered forms for a large class of operator functions. 
P. Blasiak (1,2), A. Gawron (1), A. Horzela (1), K.A. Penson (2), A.I.   Solomon (2,3) ((1) Institute of Nuclear Physics, Po...