Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Postage Stamp Problem - Formulae and proof for the case of 3
  denominations   A_k = {1, a_2, ..., a_k} is an h-basis for n if every positive integer not
exceeding n can be expressed as the sum of no more than h values a_i; an
extremal h-basis A_k is one for which n is as large as possible. Computing such
extremal bases has become known as the Postage Stamp Problem.
  In 1968 Gerd Hofmeister published formulae for solutions to the Postage Stamp
Problem with three denominations (h = 3). This paper presents an alternative
approach developed independently by the author 25 years later.

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The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg