Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some analysable instances of mu-synthesis   I describe a verifiable criterion for the solvability of the 2 by 2 spectral
Nevanlinna-Pick problem with two interpolation points, and likewise for three
other special cases of the mu-synthesis problem. The problem is to construct an
analytic 2 by 2 matrix function F on the unit disc subject to a finite number
of interpolation constraints and a bound on the cost function sup {mu(F(z)):
|z| < 1}, where mu is an instance of the structured singular value of a 2 by 2
matrix.

22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph