A visualization of Gibbs
phenomenon (above) and how the σ-approximation
(below) helps to fade away this effect.
Gibbs phenomenon:http://en.wikipedia.org/wiki/Gibbs_phenomenon
Sigma approximation:http://en.wikipedia.org/wiki/Sigma_approximation
via:http://www.mtm.ufsc.br/~azeredo/calculos/Dcalculo/xE/fourier/5mod/fourier5.html
Gibbs phenomenon:http://en.wikipedia.org/wiki/Gibbs_phenomenon
Sigma approximation:http://en.wikipedia.org/wiki/Sigma_approximation
via:http://www.mtm.ufsc.br/~azeredo/calculos/Dcalculo/xE/fourier/5mod/fourier5.html
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