Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revisiting Caianiello's Maximal Acceleration   A quantum mechanical limit on the speed of orthogonality evolution justifies
the last remaining assumption in Caianiello's derivation of the maximal
acceleration. The limit is perfectly compatible with the behaviour of
superconductors of the first type.

21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph