Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetry Aspects and Finite-Size Scaling of Quantum Hall Fluids   The exactness and universality observed in the quantum Hall effect suggests
the existence of a symmetry principle underlying Laughlin's theory. We review
the role played by the infinite $W_{\infty }$ and conformal algebras as
dynamical symmetries of incompressible quantum fluids and show how they predict
universal finite-size effects in the excitation spectrum.

24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
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The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th