Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Almost normal Heegaard surfaces   We present a new and shorter proof of Stocking's result that any strongly
irreducible Heegaard surface of a closed orientable triangulated 3-manifold is
isotopic to an almost normal surface. We also re-prove a result of Jaco and
Rubinstein on normal spheres. Both proofs are based on the "reduction"
technique introduced by the author.

11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
16
The categories of this paper are: stat
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th