Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Engel algorithm for absorbing Markov chains   In this module, suitable for use in an introductory probability course, we
present Engel's chip-moving algorithm for finding the basic descriptive
quantities for an absorbing Markov chain, and prove that it works. The tricky
part of the proof involves showing that the initial distribution of chips
recurs. At the time of writing (circa 1979) no published proof of this was
available, though Engel had stated that such a proof had been found by L.
Scheller.

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The categories of this paper are: cs
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an