Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chemical Kinetics, Markov Chains, and the Imaginary It\^{o}
  Interpretation   The abstract chemical reaction $$ A+A \to \emptyset, $$ understood as a
Markov chain in continuous time, has been studied in the physical literature
for several years. It has been claimed that this reaction can be described by
means of the stochastic differential equation $$ d \phi = - \phi^2 dt + i \,
\phi \, dW_t, $$ where $i$ is the imaginary unit. This affirmation is, at
least, intriguing, and has led to controversy and criticisms in the literature.
The goal of this work is to give partial evidence that such a description may
be possible.

25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th