Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rapidity gaps and ancestry   The recently discovered correspondence between the distribution of rapidity
gaps in electron-nucleus diffractive processes and the statistics of the height
of genealogical trees in branching random walks is reviewed. In addition, a new
comparison of numerical solutions of exact equations for diffraction on the one
hand, and for ancestry on the other hand, both established in the framework of
the color dipole model, is presented.

32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an