Category Archives: General

Recovering sparse signals from sparsely corrupted compressed measurements

Posted on March 22, 2013 by

Last Thursday after an email discussion with Thomas Arildsen, I was thinking again to the nice embedding properties discovered by Y. Plan and R. Vershynin in the context of 1-bit compressed sensing (CS) [1]. I was wondering if these could … Continue reading →

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A useless non-RIP Gaussian matrix

Posted on March 19, 2013 by

Recently, for some unrelated reasons, I discovered that it is actually very easy to generate a Gaussian matrix that does not respect the restricted isometry property (RIP) [1]. I recall that such a matrix is RIP if  there exists a … Continue reading →

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Tomography of the magnetic fields of the Milky Way?

Posted on December 7, 2011 by

I have just found this “new” (well 150 years old actually) tomographical method… for measuring the magnetic field of our own galaxy “New all-sky map shows the magnetic fields of the Milky Way with the highest precision“by Niels Oppermann et … Continue reading →

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New class of RIP matrices ?

Posted on May 18, 2010 by

Wouaw, almost one year and half without any post here…. Shame on me! I’ll try to be more productive with shorter posts now I just found this interesting paper about concentration properties of submodular function (very common in “Graph Cut” … Continue reading →

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1000th visit and some Compressed Sensing “humour”

Posted on November 23, 2008 by

As detected by Igor Carron, this blog has reached its 1000th visit ! Well, perhaps it’s 1000th robot visit Yesterday I found some very funny (math) jokes on Bjørn’s maths blog about “How to catch a lion in the Sahara … Continue reading →

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SPGL1 and TV: Answers from SPGL1 Authors

Posted on September 2, 2008 by

Following the writing of my previous post, which obtained various interesting comments (many thanks to Gabriel Peyré, Igor Carron and Pierre Vandergheynst), I sent a mail to Michael P. Friedlander and Ewout van den Berg to point them this article … Continue reading →

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First news

Posted on May 18, 2008 by

So, as many researchers in the world, I have just opened my own Science 2.0. blog : this “Le petit chercheur illustré”. An approximative English translation would be “The Illustrated (report of a) Small Researcher”. As you can see, I … Continue reading →

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