Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Toward a general theory of transmutation   A general construction of transmutation operators is developed for
selfadjoint operators in Gelfand triples. Theorems regarding analyticity of
generalized eigenfunctions and Paley-Wiener properties are proved.

28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph