Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Almost-K\"ahler anti-self-dual metrics on
  $K3\#3\overline{\mathbb{CP}_{2}}$   Donaldson-Friedman constructed anti-self-dual classes on
$K3\#3\overline{\mathbb{CP}_{2}}$ using twistor space. We show that some of
these conformal classes have almost-K\"ahler representatives.

15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
9
The categories of this paper are: nlin