Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bridges between helioseismological and asteroseismological inference   Exactly eighty years ago, a very young Yehudi Menuhin was invited by Bruno
Walter to perform Beethoven's violin concerto with the Berlin Philharmonic
Orchestra. Walking through the streets of Berlin he was unsure of his way, and
asked a passer-by how he could get to the Konzerthaus. The man looked at him,
looked down at the violin case that Yehudi was carrying, and said: `Practise,
young man, practise'. It was with such advice in their minds, I am sure, that
Margarida and Michael have asked me to try to build bridges between
helioseismology and asteroseismology. Asteroseismology is new and fresh, and
the young scientists who are entering the subject should be full of the
expectation of the delights of discovery of untrodden ground. Where should they
tread? They should be guided, perhaps, by our mature, well practised,
experiences with the Sun.

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The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci