Bell polynomials and differential equations of Freud-type polynomials (original) (raw)
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Arxiv preprint arXiv:1104.5065, 2011
New methods for derivation of Bell polynomials of the second kind are presented. The methods are based on an ordinary generating function and its composita. The relation between a composita and a Bell polynomial is demonstrated. Main theorems are written and examples of Bell polynomials for trigonometric functions, polynomials, radicals, and Bernoulli functions are given.
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Journal of Computational and Applied Mathematics, 2014
Let {R n (x)} ∞ n=0 denote the set of Appell polynomials which includes, among others, Hermite, Bernoulli, Euler and Genocchi polynomials. In this paper, by introducing the generalized factorization method, for each k ∈ N, we determine the differential operator L (x) n,k ∞ n=0 such that L (x) n,k (R n (x)) = λ n,k R n (x), where λ n,k = (n+k)! n! − k!. The special case k = 1 reduces to the result obtained in [M.X. He, P.E. Ricci, Differential equation of Appell polynomials via the factorization method, J. Comput. Appl. Math. 139 (2002) 231-237]. The differential equations for the Hermite and Bernoulli polynomials are exhibited for the case k = 2.
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Recently, Khan et al. [S. Khan, G. Yasmin, R. Khan and N. A. M. Hassan, Hermite-based Appell polynomials: Properties and Applications, J. Math. Anal. Appl. 351 (2009), 756-764] defined the Hermite-based Appell polynomials by G(x, y, z, t) := A(t)?exp(xt + yt2 + zt3) = ??,n=0 HAn(x, y, z) tn/n! and investigated their many interesting properties and characteristics by using operational techniques combined with the principle of monomiality. Here, in this paper, we find the differential, integro-differential and partial differential equations for the Hermite-based Appell polynomials via the factorization method. Furthermore, we derive the corresponding equations for the Hermite-based Bernoulli polynomials and the Hermite-based Euler polynomials. We also indicate how to deduce the corresponding results for the Hermite-based Genocchi polynomials from those involving the Hermite-based Euler polynomials.
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In this work, we propose two new methods for the determination of new identities for Bell's polynomials. The first method is based on the Lagrange inversion formula, and the second is based on the binomial sequences. These methods allow the easy recovery of known identities and deduction of some new identities of these polynomials.
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