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- George E. Andrews, Song Heng Chan, Byungchan Kim
- J. Comb. Theory, Ser. A
- 2013

By modifying the definition of moments of ranks and cranks, we study the odd moments of ranks and cranks. In particular, we prove the inequality between the first crank moment M 1 (n) and the first rank moment N 1 (n): M 1 (n) > N 1 (n). We also study new counting function ospt(n) which is equal to M 1 (n) − N 1 (n).

- Bruce C. Berndt, Heng Huat Chan, Song Heng Chan, Wen-Chin Liaw
- J. Comb. Theory, Ser. A
- 2005

- Song Heng Chan
- Discrete Mathematics
- 2008

Three proofs are given for a reciprocity theorem for a certain q-series found 7 in Ramanujan's lost notebook. The first proof uses Ramanujan's 1 ψ 1 summation the-8 orem, the second employs an identity of N. J. Fine, and the third is combinatorial. 9 Next, we show that the reciprocity theorem leads to a two variable generalization of 10 the quintuple… (More)

We show how Rank-Crank type PDEs for higher order Appell functions due to Zwegers may be obtained from a generalized Lambert series identity due to the first author. Special cases are the Rank-Crank PDE due to Atkin and the third author and a PDE for a level 5 Appell function also found by the third author. These two special PDEs are related to generalized… (More)

Using certain representations for Eisenstein series, we uniformly derive several Ramanujan-type series for 1/π.

In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Abstract Two new mock theta functions of the sixth order are defined. The main theorem… (More)

A survey of Ramanujan's work on cranks in his lost notebook is given. We give evidence that Ramanujan was concentrating on cranks when he died, that is to say, the final problem on which Ramanujan worked was cranks – not mock theta functions.

- Song Heng Chan
- Journal of Approximation Theory
- 2005

In 2003, Atkin and Garvan initiated the study of rank and crank moments for ordinary partitions. These moments satisfy a strict inequality. We prove that a strict inequality also holds for the first rank and crank moments of overpartitions and consider a new combinatorial interpretation in this setting.