Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fourier coefficients of Siegel cusp forms of degree 2 in the
  Atkin--Lehner type newspace   We prove that a non--zero $F$ in the Atkin--Lehner type Siegel newspace of
degree $2$ and an odd level $N$ is determined by fundamental Fourier
coefficients up to a divisor of $N$. In particular when the level is odd and
square--free we show that $F$ is determined by its fundamental Fourier
coefficients.

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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th