Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constant Angle Surfaces in a warped product   Let $I \subseteq \R$ be an open interval, $f : I \to \R$ a strictly positive
function and denote by $\E^2$ the Euclidean plane. We classify all surfaces in
the warped product manifold $I \times_f \E^2$ for which the unit normal makes a
constant angle with the direction tangent to $I$.

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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org