Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The algebra of harmonic functions for a matrix-valued transfer operator   We analyze matrix-valued transfer operators. We prove that the fixed points
of transfer operators form a finite dimensional $C^*$-algebra. For matrix
weights satisfying a low-pass condition we identify the minimal projections in
this algebra as correlations of scaling functions, i.e., limits of cascade
algortihms.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
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The categories of this paper are: eess
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat