Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: And free lunch for all...   This is a review of the 5-volumes of Ramanujan's Notebooks, as worked over by
Bruce C. Berndt over the last quarter of the XX-th Century. To illustrate how
useful Ramanujan's insights could be for anyone who indulges in the wild
pleasure of savoring Ramanujan's genius, the reviewer takes one formula of
Ramanujan from the Notebooks, analyses it carefully, and arrives at the
beginnings of what could be fairly called "Quantum Number Theory."

23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
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The categories of this paper are: eess
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg