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12 votes

Origin of the term "sinc" function

The Wikipedia page for the Shannon-Whittaker reconstruction formula states that Whittaker used the term "cardinal series" for the reconstruction formula $$ f(t) = \sum_{n\in\mathbb{N}} f(n)\mathrm{sin …
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2 votes

Mathematical Techniques to Reduce the Width of a Gaussian Peak

There are numerous methods in the context of "inverse problems". Assuming that the Gaussian peaks are generated by a convolution of a "spike train" (i.e. a sum of positive Diracs peaks) with a Gaussia …
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4 votes

When is a mapping the proximity operator of some convex function?

The paper On Decomposing the Proximal Map, Yaoliang Yu, NIPS, 2013 states that in Jean J. Moreau. Proximité et dualtité dans un espace Hilbertien. Bulletin de la Société Mathématique de F …
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