Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solvability of one kind of forward-backward stochastic difference
  equations   In this paper, we study the solvability problem for one kind of fully coupled
forward-backward stochastic difference equations (FBS{\Delta}Es). With the help
of the necessary and sufficient condition for the solvability of the linear
FBS{\Delta}Es, under the monotone assumption, we obtain the existence and
uniqueness theorem for the general nonlinear ones.

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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga