Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Fundamental Inequality for Lower-bounding the Error Probability for
  Classical and Quantum Multiple Access Channels and Its Applications   In the study of the capacity problem for multiple access channels (MACs), a
lower bound on the error probability obtained by Han plays a crucial role in
the converse parts of several kinds of channel coding theorems in the
information-spectrum framework. Recently, Yagi and Oohama showed a tighter
bound than the Han bound by means of Polyanskiy's converse. In this paper, we
give a new bound which generalizes and strengthens the Yagi-Oohama bound, and
demonstrate that the bound plays a fundamental role in deriving extensions of
several known bounds. In particular, the Yagi-Oohama bound is generalized to
two different directions; i.e, to general input distributions and to general
encoders. In addition we extend these bounds to the quantum MACs and apply them
to the converse problems for several information-spectrum settings.

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The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th