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Discrete Minimal Surface Algebras
Symmetry, integrability and geometry: methods and applications, Tome 6 (2010) Cet article a éte moissonné depuis la source Math-Net.Ru

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We consider discrete minimal surface algebras (DMSA) as generalized noncommutative analogues of minimal surfaces in higher dimensional spheres. These algebras appear naturally in membrane theory, where sequences of their representations are used as a regularization. After showing that the defining relations of the algebra are consistent, and that one can compute a basis of the enveloping algebra, we give several explicit examples of DMSAs in terms of subsets of $\mathfrak{sl}_n$ (any semi-simple Lie algebra providing a trivial example by itself). A special class of DMSAs are Yang–Mills algebras. The representation graph is introduced to study representations of DMSAs of dimension $d\le 4$, and properties of representations are related to properties of graphs. The representation graph of a tensor product is (generically) the Cartesian product of the corresponding graphs. We provide explicit examples of irreducible representations and, for coinciding eigenvalues, classify all the unitary representations of the corresponding algebras.
Keywords: noncommutative surface; minimal surface; discrete Laplace operator; graph representation; matrix regularization; membrane theory; Yang–Mills algebra. 
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     author = {Joakim Arnlind and Jens Hoppe},
     title = {Discrete {Minimal} {Surface} {Algebras}},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2010_6_a41/}
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Joakim Arnlind; Jens Hoppe. Discrete Minimal Surface Algebras. Symmetry, integrability and geometry: methods and applications, Tome 6 (2010). http://geodesic.mathdoc.fr/item/SIGMA_2010_6_a41/

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