In principle, the generalization to more than one dimension is rather straightforward if one uses the tensor
product. Let us first take an example, with the spectral representation of a scalar function defined
on the square
in terms of Chebyshev polynomials. One simply writes
http://www.livingreviews.org/lrr-2009-1 |
Living Rev. Relativity 12, (2009), 1
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