Friday, February 22, 2013

1302.5387 (Etienne Le Masson)

Pseudo-differential calculus on homogeneous trees    [PDF]

Etienne Le Masson
In the objective of studying concentration and oscillation properties of eigenfunctions of the discrete Laplacian on regular graphs, we construct a pseudo-differential calculus on homogeneous trees, their universal covers. We define symbol classes and associated operators. We prove that these operators are bounded on L^2 and give adjoint and product formulas. Finally we compute the symbol of the commutator of a pseudo-differential operator with the Laplacian.
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