Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse of the Vandermonde and Vandermonde confluent matrices   The inverse of the Vandermonde and confluent Vandermonde matrices are
presented. In the case of the Vandermonde matrix, we present a decomposition in
three factors, one of them a diagonal matrix. The evaluation of such inverse
matrices is a key point to find functions of a matrix, namely exponential
functions (evolution operators)and logarithmic functions (entropies) in quantum
mechanical topics.

25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
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The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn