Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 2-iterated Sheffer polynomials   In this article, the 2-iterated Sheffer polynomials are introduced by means
of generating function and operational representation. Using the theory of
Riordan arrays and relations between the Sheffer sequences and Riordan arrays,
a determinantal definition for these polynomials is established. The
quasi-monomial and other properties of these polynomials are derived. The
generating function, determinantal definition, quasi-monomial and other
properties for some new members belonging to this family are also considered.

11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn