Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Model reduction in chemical dynamics: slow invariant manifolds, singular
  perturbations, thermodynamic estimates, and analysis of reaction graph   The paper has two goals:
  It presents basic ideas, notions, and methods for reduction of reaction
kinetics models: quasi-steady-state, quasi-equilibrium, slow invariant
manifolds, and limiting steps.
  It describes briefly the current state of the art and some latest
achievements in the broad area of model reduction in chemical and biochemical
kinetics, including new results in methods of invariant manifolds, computation
singular perturbation, bottleneck methods, asymptotology, tropical
equilibration, and reaction mechanism skeletonisation.

6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg