Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on the first-order flexes of smooth surfaces which are tangent to
  the set of all nonrigid surfaces   We prove that first-order flexes of smooth surfaces in Euclidean 3-space,
which are tangent to the set of all nonrigid surfaces, can be extended to
second-order flexes.

27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org