William Y. C. Chen, Kathy Q. Ji, Herbert S. Wilf
Published 2006-05-17Version 2
We find the number of partitions of $n$ whose BG-rank is $j$, in terms of $pp(n)$, the number of pairs of partitions whose total number of cells is $n$, giving both bijective and generating function proofs. Next we find congruences mod 5 for $pp(n)$, and then we use these to give a new proof of a refined system of congruences for $p(n)$ that was found by Berkovich and Garvan.
On the Intriguing Problem of Counting (n+1,n+2)-Core Partitions into Odd Parts
Partitions for semi-magic squares of size three
Hooks and powers of parts in partitions
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