Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The problem of mutually unbiased bases in dimension 6   We outline a discretization approach to determine the maximal number of
mutually unbiased bases in dimension 6. We describe the basic ideas and
introduce the most important definitions to tackle this famous open problem
which has been open for the last 10 years. Some preliminary results are also
listed.

21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th