Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parametric production matrices and weighted succession rules: a Dyck
  path example   We introduce weighted succession rules and parametric production matrices -
simple extensions of the standard ECO method succession rules and production
matrices. The purpose is to enumerate combinatorial objects with respect to
several variables. We consider one main example, from the theory of Dyck paths.
The path statistics primarily considered are peak height, rise height, and
certain subwalks. Many classical sequences (such as the Catalan, Motzkin,
Narayana and Schroeder numbers) are incorporated in this example.

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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph