Combinatorial proofs of some Bell number formulas
classification
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bellnumberproofssometermsargumentsbijectivecatalan
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In this note, we provide bijective proofs of some identities involving the Bell number, as previously requested. Our arguments may be extended to yield a generalization in terms of complete Bell polynomials. We also provide a further interpretation for a related difference of Catalan numbers in terms of the inclusion-exclusion principle.
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