Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comb model with slow and ultraslow diffusion   We consider a generalised diffusion equation in two dimensions for modeling
diffusion on a comb-like structures. We analyse the probability distribution
functions and we derive the mean squared displacement in $x$ and $y$
directions. Different forms of the memory kernels (Dirac delta, power-law, and
distributed order) are considered. It is shown that anomalous diffusion may
occur along both $x$ and $y$ directions. Ultraslow diffusion and some more
general diffusive processes are observed as well. We give the corresponding
continuous time random walk model for the considered two dimensional
diffusion-like equation on a comb, and we derive the probability distribution
functions which subordinate the process governed by this equation to the Wiener
process.

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The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom