Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Morphisms from Quintic Threefolds to Cubic Threefolds are Constant   We show that every morphism from a degree 5 hypersurface in 4-dimensional
projective space to a nonsingular degree 3 hypersurface in 4-dimensional
projective space is necessarily constant. In the process, we also classify
morphisms from the projective plane to nonsingular cubic threefolds given by
degree 3 polynomials.

30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph