A context-free grammar for the Ramanujan-Shor polynomials
A context-free grammar for the Ramanujan-Shor polynomials
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Ramanujan-Shor 多项式的上下文无关文法
DOI:
10.1016/j.aam.2019.04.005
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发表时间:
2018-10
期刊:
影响因子:
--
通讯作者:
Harold R.L. Yang
中科院分区:
文献类型:
--
作者:
William Y.C. Chen;Harold R.L. Yang
The polynomials ψ k (r, x) were introduced by Ramanujan. Berndt, Evans and Wilson obtained a recurrence relation for ψ k (r, x). Shor introduced polynomials related to improper edges of a rooted tree, leading to a refinement of Cayley's formula. Zeng realized that the polynomials of Ramanujan coincide with the polynomials of Shor, and that the recurrence relation of Shor coincides with the recurrence relation of Berndt, Evans and Wilson. These polynomials also arise in the work of Wang and Zhou on the orbifold Euler characteristics of the moduli spaces of stable curves. Dumont and Ramamonjisoa found a context-free grammar G to generate the number of rooted trees on n vertices with k improper edges. Based on the grammar G, we find a grammar H for the Ramanujan-Shor polynomials. This leads to a formal calculus for these polynomials. In particular, we obtain a grammatical derivation of the Berndt-Evans-Wilson-Shor recursion. We also provide a grammatical approach to the Abel identities and a grammatical explanation of the Lacasse identity.
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DOI:
10.37236/7288
发表时间:
2017-10
期刊:
Electron. J. Comb.
影响因子:
--
作者:
Shi-Mei Ma;Y. Yeh
通讯作者:
Shi-Mei Ma;Y. Yeh
DOI:
10.1016/j.ejc.2017.12.004
发表时间:
2018-05
期刊:
Eur. J. Comb.
影响因子:
--
作者:
Victor J. W. Guo
通讯作者:
Victor J. W. Guo
影响因子:
1.1
作者:
Chen William Y. C.;Fu Amy M.
通讯作者:
Fu Amy M.
DOI:
10.37236/3016
发表时间:
2012-12
期刊:
Electron. J. Comb.
影响因子:
--
作者:
William Y. C. Chen;Janet F. F. Peng-Janet-F.-F.-Peng-46408159;Harold R. L. Yang
通讯作者:
William Y. C. Chen;Janet F. F. Peng-Janet-F.-F.-Peng-46408159;Harold R. L. Yang
DOI:
10.1006/aama.2001.0738
发表时间:
2001-07
期刊:
Adv. Appl. Math.
影响因子:
--
作者:
William Y. C. Chen;Victor J. W. Guo
通讯作者:
William Y. C. Chen;Victor J. W. Guo