Kun-Yang Wang Beijing Normal University (China)
A survey of my joint research with Gavin Brown I have been collaborating with Gavin Brown since
1990. Our research mainly concerns the positivity of trigonometric sums and Jacobi polynomial
sums. It also concerns multiple trigonometric sums and the convergence of the linear means of
multiple Fourier series and Fourier-Laplace series. The present report is a survey on our joint results.
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