Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singularities of codimension two mean curvature flow of symplectic
  surfaces   We prove that for a mean curvature flow of a compact symplectic surface in a
compact Kaehler-Einstein surface, the tangent cone at the first blow-up time
consists of a finite union of more than two 2-planes in $R^4$ which are complex
in a complex structure on $R^4$.

35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th