Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonstandard model categories and homotopy theory   In order to apply nonstandard methods to questions of algebraic geometry we
continue our investigation from "Enlargements of categories" (Theory Appl.
Categ. 14 (2005), No. 16, 357--398) and show how important homotopical
constructions behave under enlargements.

36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol