Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relative Chow-Kuenneth decompositions for morphisms of threefolds   We show that any nonconstant morphism of a threefold admits a relative
Chow-Kuenneth decomposition. As a corollary we get sufficient conditions for
threefolds to admit an absolute Chow-Kuenneth decomposition. In case the image
of the morphism is a surface, this implies another proof of a theorem on the
absolute Chow-Kuenneth decomposition for threefolds satisfying a certain
condition, which was obtained by the first author with P. L. del Angel. In case
the image is a curve, this improves in the threefold case a theorem obtained by
the second author where the singularity of the morphism was assumed isolated
and the condition on the general fiber was stronger.

7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys