Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The rank of the fundamental group of certain hyperbolic 3-manifolds
  fibering over the circle   We determine the rank of the fundamental group of those hyperbolic
3-manifolds fibering over the circle whose monodromy is a sufficiently high
power of a pseudo-Anosov map. Moreover, we show that any two generating sets
with minimal cardinality are Nielsen equivalent.

10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph