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Teoreticheskaya i Matematicheskaya Fizika, 2016, Volume 189, Number 1, Pages 15–35
DOI: https://doi.org/10.4213/tmf9185
(Mi tmf9185)
 

Some matrix functional equations

M. Bruschiab, F. Calogeroab

a Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Roma, Italy
b Department of Physics, University of Rome ``La Sapienza'', Roma, Italy
References:
Abstract: We investigate the pair of matrix functional equations G(x)F(y)=G(xy) and G(x)G(y)=F(y/x), featuring the two independent scalar variables x and y and the two N×N matrices F(z) and G(z) (with N an arbitrary positive integer and the elements of these two matrices functions of the scalar variable z). We focus on the simplest class of solutions, i.e., on matrices all of whose elements are analytic functions of the independent variable. While in the scalar (N=1) case this pair of functional equations only possess altogether trivial constant solutions, in the matrix (N>1) case there are nontrivial solutions. The se solutions satisfy the additional pair of functional equations F(x)G(y)=G(y/x) and F(x)F(y)=F(xy), and an endless hierarchy of other functional equations featuring more than two independent variables.
Keywords: matrix functional equations.
English version:
Theoretical and Mathematical Physics, 2016, Volume 189, Issue 1, Pages 1411–1429
DOI: https://doi.org/10.1134/S0040577916100020
Bibliographic databases:
Language: Russian
Citation: M. Bruschi, F. Calogero, “Some matrix functional equations”, TMF, 189:1 (2016), 15–35; Theoret. and Math. Phys., 189:1 (2016), 1411–1429
Citation in format AMSBIB
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\paper Some matrix functional equations
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  • https://www.mathnet.ru/eng/tmf/v189/i1/p15
  • Citing articles in Google Scholar: Russian citations, English citations
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    Теоретическая и математическая физика Theoretical and Mathematical Physics
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