Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adaptive Codes: A New Class of Non-standard Variable-length Codes   We introduce a new class of non-standard variable-length codes, called
adaptive codes. This class of codes associates a variable-length codeword to
the symbol being encoded depending on the previous symbols in the input data
string. An efficient algorithm for constructing adaptive codes of order one is
presented. Then, we introduce a natural generalization of adaptive codes,
called GA codes.

32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
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The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex