Showing posts from July, 2010

The turn of a friendly card - Train numbering trick

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 ?

Source : (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

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

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

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