Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Algebraic Poincare cobordism   This paper is an introduction to the use of the cobordism of chain complexes
with Poincar\'e duality in surgery theory. It is a companion to the author's
paper "An introduction to algebraic surgery" math.AT/0008071 (to appear in
Volume 2 of Surveys in Surgery Theory, Ann. of Maths. Studies, Princeton, 2001)
which is an introduction to algebraic surgery using forms and formations.

11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con