Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A well-posedness for the reaction diffusion equations of
  Belousov-Zhabotinsky reaction   The time-global existence of unique smooth positive solutions to the reaction
diffusion equations of the Keener-Tyson model for the Belousov-Zhabotinsky
reaction in the whole space is established with bounded non-negative initial
data. Deriving estimates of semigroups and time evolution operators, and
applying the maximum principle, the unique existence and the positivity of
solutions are ensured by construction of time-local solutions from certain
successive approximation. Invariant regions and long time behavior of solutions
are also discussed.

30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas