Spherical Harmonics Interpolation, Computation of Laplacians and Gauge Theory

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dc.creatorRuffini, Giulio
dc.creatorMarco, Josep
dc.creatorGrau, Carles
dc.date2002-06-03
dc.date.accessioned2026-07-07T06:36:18Z
dc.date.available2026-07-07T06:36:18Z
dc.descriptionThe aim in this note is to define an algorithm to carry out minimal curvature spherical harmonics interpolation, which is then used to calculate the Laplacian for multi-electrode EEG data analysis. The approach taken is to respect the data. That is, we implement a minimal curvature condition for the interpolating surface subject to the constraints determined from the multi-electrode data. We implement this approach using spherical harmonics interpolation. In this elegant example we show that minimization requirement and constraints complement each other to fix all degrees of freedom automatically, as occurs in gauge theories. That is, the constraints are respected, while only the orthogonal subspace minimization constraints are enforced. As an example, we discuss the application to interpolate control data and calculate the temporal sequence of laplacians from an EEG Mismatch Negativity (MMN) experiment (using an implementation of the algorithm in IDL).
dc.description14 pages, 3 figures. This is an internal Starlab Knowledge Nugget, with public status
dc.identifierhttps://arxiv.org/abs/physics/0206007
dc.identifierhttp://arxiv.org/abs/physics/0206007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100038
dc.subjectMedical Physics
dc.subjectData Analysis, Statistics and Probability
dc.subjectNeurons and Cognition
dc.titleSpherical Harmonics Interpolation, Computation of Laplacians and Gauge Theory
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