The r-Stirling Numbers.
STANFORD UNIV CA DEPT OF COMPUTER SCIENCE
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The r-Stirling numbers of the first and second kind count restricted permutations and respectively restricted partitions, the restriction being that the first r elements must be in distinct cycles and respectively distinct subsets. The combinatorial and algebraic properties of these numbers, which in most cases generalize similar properties of the regular Stirling numbers, are explored starting from the above definition. Author
- Theoretical Mathematics