Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Invariants of Surfaces in Three-Dimensional Affine Geometry   Using the method of moving frames we analyze the algebra of differential
invariants for surfaces in three-dimensional affine geometry. For elliptic,
hyperbolic, and parabolic points, we show that if the algebra of differential
invariants is non-trivial, then it is generically generated by a single
invariant.

32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
19
The categories of this paper are: eess