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Showing posts from 2010

Cucu fraternel - are there such things as french maths?

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For french listening folks only: " Mathématiques : quelle pérennité pour le prestige français ? " on France Culture today. Following the recent Fields medals , the discussion goes along the following tracks: How long does it take to become a mathematician? Has a 3-year long project some sense in mathematics? Why is a paper outdated after 3 years in biology, while only after 30 years in maths? Why a Minister of Higher Education and Research is so booked (s)he cannot attend such a debate? Panel: Michel Broué , mathématicien, professeur à l’université Paris Diderot, Pierre Cartier , mathématicien, CNRS/IHES, Dominique Leglu , directrice de la rédaction de la revue Sciences et Avenir, Bertrand Monthubert ,  mathématicien, Institut de mathématiques de Toulouse, with interviews of Cédric Villani , mathématicien, professeur à l’Institut Camille Jordan, directeur de l’Institut Henri Poincaré et médaille Fields 2010 and Wendelin Werner, professeur de mathématiques, université

Upcoming conferences (concern Fees) - The latent ones

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Saint-Malo Intra-Muros. I went like an " animal sot " to Saint-Malo (Brittany) and returned enchanted by the 2010 edition of the Latent Variable Analysis and Independant Component Analysis ( LVA-ICA 2010 ). The four excellent keynote/plenary speeches : When tensor decomposition meets compressed sensing, by Pierre Comon (University of Nice, France), admittedly with an ad-like title, more akin to coherence than CS ; Discrimination with deformation for classification, by Stéphane Mallat (Ecole Polytechnique, France), when mapping complex wavelet coefficients to the lower frequencies yields a scattering metric; Bayesian non-negative matrix factorisation methods to detect dye labelled DNA oligonucleotides in multiplexed Raman spectra, by Mark Girolami (University of Glasgow, UK); 2nd order statistics + A 3rd data dimension = Just weight and see!, by Arie Yeredor (Tel-Aviv University, Israel); should be webcasted soon (stay tuned, i got audio bootlegs for personal use). M

See my very appreciation to Yves Meyer's price

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Emys turtle from http://en.wikipedia.org/wiki/Emys While a decent anagram with two "y" and four "e" still hides under the carpet (much better ones related to Alain Connes , Fields medalist), see my very appreciation to Yves Meyer' s Carl Friedrich Gauss price ( here in French ), four years after Kiyoshi Itō . At ICM 2010 , it is said that, along with his work on wavelets ("wavelet theory has become the new name for Fourier analysis", gosh!), [...] he has found a surprising connection between his early work on the model sets used to construct quasicrystals — the ‘Meyer Sets’ — and ‘ compressed sensing ’, a technique used for acquiring and reconstructing a signal utilizing the prior knowledge that it is sparse or compressible. Which should please Igor Carron , of course. Every emys knows that every four years, Fields medals are attributed to talented mathematicians. The country of course honors Ngô Bao Châu ( fundamental Lemma in the theory of a

The turn of a friendly card - Train numbering trick

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Coming back from Orléans (France) on March 2010 for the Second conference  " Mathematics and Image processing " (Deuxième colloque " Méthodes mathématiques pour l’image ") organized at MAPMO . Having presented stuff on Statistical estimators based on Stein's principle for  M-band wavelets and filter banks ( abstract , slides , codes ). Waiting in a train, staring again (and pixing) at the eight-seat compartment  numbering once discussed here .  Since Igor Carron posted this Magic trick for summer vacations on Nuit Blanche (constest won by Laurent Jacques ), I propose the following one again. Pictures attest the realness of the data, in contrast to Igor thought experiment (vicious tackle). Seat numbering is split in odd and even (unlike in six-seat cars), face-to-face, as: .1 .3 .7 .5 .2 .8 .4 .6 The 3 (mod 8) sum is obvious. Easy enough for front-to-front booking by ancient computers. So why not the simple child Gauss-like arrangement? .1 .3

Leurrer ? Détrompez-vous ! - Dompterez-vous l'erreur ?

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Source : http://cereales.lapin.org/ (705) On doit à René Thom (médaille Fields 1958) : "ce qui limite le vrai n’est pas le faux, mais l’insignifiant" [Paraboles et Catastrophes, Champs Flammarion, p. 127] (citation déjà évoquée à propos de l' antienne sur l'infobésité, ou la surabondance d'information de notre monde). On attribue à Wolfgang Pauli, pestant contre un article de physique sans  intérêt,  "ce n’est pas juste et, pire, ce n’est même pas faux !" (cf. WikiQuote on Pauli ). Cette idée n'est pas toujours évidente (voire contre intuitive) pour les élèves, étudiants, le grand public et - voire - pour une partie des contributeurs à la recherche scientifique. Le festival "Science jeune public" (et peut-êre même les moins jeunes) oeuvre cette année dans le sens de cet éclaircissement sous le titre : Détrompez-vous (du 21 au 24 juillet 2010 à l' Ecole normale supérieure ) La Journée Grand Public qui aura lieu le samedi 24 ju

Upcoming SIVA signal and image conferences - Concern fees

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Today we update on the SIVA: Signal, Image, Video and Applications conferences page. Long time ahead is ICASSP 2014 website running. Not much information yet, execpt in this information pdf file , like a call to image processing tools like inpainting. ICIP 2013 (Melbourne, Australia), ICASSP 2013 (Vancouver, Canada) are open but scarse as well. Closer from us, SAMPTA 2011 held in Singapore (deadline on 01/10/2010), ISCAS 2011 in Rio de Janeiro, Brazil (deadline on 29/09/2011, sooner for Special sessions), ICASSP 2011 in Prague, Czech Rebublic (deadline on 20/10/2010), ICCV 2011 in Barcelona, Spain (deadline on 01/03/2011). ICIP 2011 in Brussels, Belgium, has no deadline for now. MWSCAS 2011, once believed in Brazil, will be in fabulous Seoul, South Korea (deadline 04/03/2010). SIVA would not be complete without the annual Conference on Digital Image Content Knowledge, held in Chicago, Illinois, USA. For myself, i will try to enjoy the shores of Saint-Malo at LVA/ICA 2010

Time is the simplest (non-commutative) thing

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One of the most elegant theorems of all times is 4-word: every finite field commutes ( Wedderburn's little theorem ). While having life-long interests in anagrams and questions about time, i never thought they were related. They are. Thanks to the conference: Un espace non-commutatif engendre son propre temps , by Alain Connes on 06 November 2007 in Metz, France ( downloadable video , 220 Mb, flv format, since i failed in embedding it into the blog). Alain Connes is both a tremendous mathematician and wonderful, passionate story-teller. A cryptic message by a friend's child: Je suis Alençonnais , et non alsacien , si tu veux un conseil nana , rendez-vous au coin annales and a story about book reading by japanese mathematician Minoru Tomita ( and related results ) lead us to a lesson on associativity and commutativity rules. Anagrams are possible only because written language is associative and non-commutative ( no alternative !). Meaningful anagrams (such as seen in Re

Dimension-reduction, High-dimensional problems and solutions, Workshop, June 2010

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In epochs of information overload (or overlook) , salvation comes from conferences like the HDPS 2010 workshop organized on 21 and 22 of June 2010 on High Dimensional Problems and Solutions , with Ron DeVore (Dep. of Mathematics,Texas A&M University, USA, recipient of the Foundation's Research Chaire of Excellence 2009) and Albert Cohen (UPMC, LJLL). Indeed: Several important areas of science are confronted with the having to recover a functions of many variables either from large data sets or from complex mathematical models. Such recovery is inhibited by what is commonly called the 'curse of dimensionality' which says the numerical approximation of such a function will require inordinately more computation as the number of active variables increases. This workshop bring together the world's leading experts on high dimensional problems to discuss their recent research in areas such as manifold learning, stochastic and parametric PDEs, and optimal recovery. The p

Minotaure, tu dois finir ta thèse (Simon Berjeaut), paroles

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Simon Berjeaut était l'invité de Grantanfi (doctorants, l'avenir dure longtemps) sur France Culture le mercredi 21/11/2012 . Simon Berjeaut est l'auteur de la chanson du Minotaure , ou " Tu dois finir ta thèse ", message d'espoir en chanson pour les doctorants et doctorantes en mal de manuscrit, dont je vous avais parlé il y a deux mois , et qu' Igor Carron avait proposé de rendre viral sur YouTube . La vidéo se télécharge là . Et les paroles sont un peu plus bas... En passant, un coucou à mes doctorantes et doctorants en cours et diplomé.e.s : Caroline Chaux , Jérôme Gauthier , Mai Quyen-Pham , Aurélie Pirayre , Arthur Marmin , Lauriane Bouard , Sarah Fajon , Surabhi Jagtap , Louna Al Souki, ainsi que Colombe Vendeuvre et Cyril Faure. Maurits Cornelis Escher : Angels and Demons (1942) C'était à l'époque cendreuse de Eyjafjallajökull , et cette chanson évoque le piton de la Fournaise. Pourquoi le Minotaure ? Pour Th

Information overload - And no more trivia, fool!

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[Update 2014/05/20 with Ann Blair publications] There is a recent concern about information overload. Or is there? According to the following independent sources: Science 2.0 Approach to Research , by Erik Duval (not family) Academic publishing is archaic , by Daniel Lemire the problem is not so recent. Ann Blair already informed us in 2003 that there were Reading Strategies for Coping with Information Overload ca. 1550-1700 : The "multitude of books" was a subject of wonder and anxiety for authors who reflected on the scholarly condition in the sixteenth through the eighteenth centuries. In the preface to his massive project of cataloguing all known books in the Bibliotheca univeralis (1545) Conrad Gesner complained of that "confusing and harmful abundance of books," a problem which he called on kings and princes and the learned to solve.  By 1685 the situation seemed absolutely dire to Adrien Baillet, who warned: "We have reason to fear that th

All PhDs unite: une chanson pour les thésard(e)s du monde entier (francophone)

[Mise à jour : la vidéo du Minotaure (ou "tu dois finir ta thèse) de Simon Berjeaut, mais surtout les paroles, sont à Minotaure, tu dois finir ta thèse (again) ] Pour les doctorants du monde entier, une ode à la fin de thèse : "Tu dois finir ta thèse". La vidéo est téléchargeable ici : http://www.laurent-duval.eu/_Share/Tu_dois_finir_ta_these.mp4 et mise sur You Tube, car elle ne semblait pas y être ( http://www.youtube.com/watch?v=rbfse8Af_Ps ) par Igor Carron (de Nuit Blanche ). Merci à Elodie Jeandel pour l'info (sur Facebook ).

Raah - Haar year (toute)

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Today a call for paper, a celebration of Haar centenary, codes for multivariate denoising and a thought. 2010 is the centenary (with 1 % imprecision) of the Haar wavelet (or Haarlet). Oddly, it possesses an anagram, raah . According to Urban Dictionary , raah denotes: A richly dressed person, usually with big hair and are commonly situated in Surrey. They enjoy prancing around in Ralph Lauren, Jack Wills and Abercrombie & Fitch. Their grooming and hair can be described as messy, but stylish. To celebrate such a birthday, everybody is invited to contribute to the call for paper to Elevier Signal Processing: Advances in Multirate Filter Bank Structures and Multiscale Representations , with a 15 February 2010 deadline. The CfP is featured at several other places: http://www.elsevier.com/wps/find/journaldescription.cws_home/505662/description#description http://www.elsevier.com/inca/publications/misc/sigpromultirate.pdf http://www.wikicfp.com/ http://www.ee.cuhk.edu.hk/~t