Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surface bundles over surfaces: new inequalities between signature,
  simplicial volume and Euler characteristic   We present three new inequalities tying the signature, the simplicial volume
and the Euler characteristic of surface bundles over surfaces. Two of them are
true for any surface bundle, while the third holds on a specific family of
surface bundles, namely the ones that arise through a ramified covering. These
are the main known examples of bundles with non-zero signature.

0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga