Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compact spacelike surfaces whose mean curvature function satisfies a
  nonlinear inequality in a 3-dimensional Generalized Robertson-Walker
  spacetime   Spacelike surfaces in Generalized Robertson-Walker spacetimes whose mean
curvature function satisfies a natural nonlinear inequality are analyzed.
Several uniqueness and nonexistence results for such compact spacelike surfaces
are proved. In the nonparametric case, new Calabi-Bernstein type problems are
solved as a consequence.

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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat