Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Free and nearly free surfaces in $P^3$   We define the nearly free surfaces in $P^3$ and show that the Hilbert
polynomial of the Milnor algebra of a free or nearly free surface in $P^3$ can
be expressed in terms of the exponents. An analog of Saito's criterion of
freeness in the case of nearly free divisors is proven and examples of
irreducible free and nearly free surfaces are given.

24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th