Blasial, P.; Gawron, A.; Horzela, A.; Penson, K.A. and Solomon, A.I.
Combinatorial solutions to normal ordering of bosons.
Czechoslovak Journal of Physics, 55(11) pp. 1335–1341.
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.
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