Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\delta$(3)-ideal null 2-type hypersurfaces in Euclidean spaces   In the theory of finite type submanifolds, null 2-type submanifolds are the
most simple ones, besides 1-type submanifolds (cf. e.g., [3, 12]). In
particular, the classification problems of null 2-type hypersurfaces are quite
interesting and of fundamentally important. In this paper, we prove that every
$\delta$(3)-ideal null 2-type hypersurface in a Euclidean space has constant
mean curvature and constant scalar curvature.

20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
7
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: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph