Thursday, June 26, 2008

CS: Compressed sensing and transference talk.

The Colloque D'Analyse Harmonique D'Orsay will feature a talk by Yves Meyer at 2:10 till 3:00 pm on July 9th. The title of the talk is "Compressed sensing and transference".

What's transference you say ? Google says this. But I personally don't know, Terry Tao defines a transference principle:

This theorem does not directly apply to the prime numbers {\mathcal P}, as they have density zero, but it turns out that there is a trick (which Ben Green and I call the transference principle) which (very roughly speaking) lets one locate a dense set of integers A which “models” the primes, in the sense that there is a relationship between additive patterns in A and additive patterns in {\mathcal P}. (The relationship here is somewhat analogous to Monte Carlo integration, which uses the average value of a function f on a sparse set to approximate the average value of f on a much larger domain.) As a consequence of this principle, Ben and I were able to use SzemerĂ©di’s theorem to establish that the primes contained arbitrarily long arithmetic progressions.


Primes number subsets, mmmhhh, it looks like an extension of his previous result. We'll see.

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