Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vector bundles on Hirzebruch surfaces whose twists by a non-ample line
  bundle have natural cohomology   Here we study vector bundles $E$ on the Hirzebruch surface $F_e$ such that
their twists by a spanned, but not ample, line bundle $M = \mathcal
{O}_{F_e}(h+ef)$ have natural cohomology, i.e. $h^0(F_e,E(tM)) >0$ implies
$h^1(F_e,E(tM)) = 0$.

35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph