Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Class invariants by the CRT method   We adapt the CRT approach for computing Hilbert class polynomials to handle a
wide range of class invariants. For suitable discriminants D, this improves its
performance by a large constant factor, more than 200 in the most favourable
circumstances. This has enabled record-breaking constructions of elliptic
curves via the CM method, including examples with |D|>10^15.

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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio