Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strongly Nonlinear Differential Equations with Carlitz Derivatives over
  a Function Field   In earlier papers the author studied some classes of equations with Carlitz
derivatives for $\mathbb F_q$-linear functions, which are the natural function
field counterparts of linear ordinary differential equations. Here we consider
equations containing self-compositions $u\circ u\circ ... \circ u$ of the
unknown function. As an algebraic background, imbeddings of the composition
ring of $\mathbb F_q$-linear holomorphic functions into skew fields are
considered.

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The categories of this paper are: quant-ph
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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: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc