Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Age-dependent equations with non-linear diffusion   We consider the well-posedness of models involving age structure and
non-linear diffusion. Such problems arise in the study of population dynamics.
It is shown how diffusion and age boundary conditions can be treated that
depend non-linearly and possibly non-locally on the density itself. The
abstract approach is depicted with examples.

8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio