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# Posts

### October 19, 2014

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Taking advantage of his visit to Paris this month, Shravan Vasishth, from University of Postdam, Germany, will give a talk at 10.30am, next Friday, October 24, at ENSAE on: Using Bayesian Linear Mixed Models in Psycholinguistics: Some open issues With the arrival of the probabilistic programming language Stan (and JAGS), it has become relatively easy […]
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I just like his picture obtained with chemlambda because it gives many ideas, among them the following: if multiplication (reproduction) is Nature’s way to do a fanout and if a brain (and actually the whole organism) grows from a small seed then it must be that we may think about a brain as having one […]
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I have written a short article with my response on Todd Trimble’s commentary on my book. In this response I present these of Todd Trimble’s results which are new for me. Note that I skipped specifically category-theoretic results (such as that the category of endofuncoids is topological). I am going to amend my article with […]
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No summary available for this post.
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John Cook spoke at KeenCon on Bayesian statistics as a way to integrate intuition and data. A fantasy sports wizard’s winning formula, from Brad Reagan at the Wall Street Journal. Via Hacker News. From Dan Egan of Betterment, It’s About Time in the Market, Not Market Timing, an analysis of the distribution of returns based […]
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10 + 1 - 9 = 1 * √4 Also: 101 (mod 9) = 1 * √4 Also: 10 - 1 = 9 * 1^4
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Filed under: pictures, Running Tagged: geese, Parc de Sceaux
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Rheinmain TV berichtet über ein 24-Stunden-Mathematik-Event diese Woche in Frankfurt mit 70 völlig freiwillig teilnehmenden Schülern (O-Ton:”obwohl es uns der Lehrer schon sehr zu Herzen gelegt hat, aber der muß sowieso früher gehen”) von 8 Uhr morgens bis um 8 Uhr am nächsten Morgen: 24-Stunden-Events kennt man ja sonst eher vom Blitzschach und da ist…

### October 18, 2014

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This past week in Warwick has been quite enjoyable and profitable, from staying once again in a math house, to taking advantage of the new bike, to having several long discussions on several prospective and exciting projects, to meeting with some of the new postdocs and visitors, to attending Tony O’Hagan’s talk on “wrong models”. […]
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The october issue of Gazette des Mathématiciens  has a transcript in french of a really fascinating interview of Vladimir Voevodsky, as part of a dossier on Théorie des types et mathématiques certifiées. The hour long video of that interview, in english and conducted by Gaël Octavia from Fondation Sciences Mathématiques de Paris (see also a […]
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Many of my second grade classrooms are in the middle of their addition units. The classes often teach place value and addition strategies during the months of September and October. When introducing addition strategies, teachers rarely start using the standard addition algorithm (see # 4). Manipulatives and visual representations are heavily used during the first […]
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Factoring, factoring, the whole day through, keeps on my mind—apologizes to Hoagy Carmichael and Stuart Gorrell Waterloo Mathematics source Michael Rubinstein is an expert on number theory, who is on the faculty of the University of Waterloo. He is one of the organizers of a 61-birthday symposium being held December 15–19 in Princeton for my […]
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10 = 1 + 8 + 1^4 Also: 1 + 0 + 1 = 8 * 1 / 4 Also: 101 (mod 8) = 1 + 4

### October 17, 2014

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Filed under: Kids, pictures, Travel Tagged: Barbamama, Barbapapa, bicycle, mountain bike, Paris
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Spero che i miei lettori mi perdoneranno per il timing di questo post, che non è esattamente dei migliori: ma il Carnevale della Matematica è appuntamento così importante che non è possibile dimenticarlo. Meglio ritardare di qualche giorno, ma saltare un'edizione no, non sia mai.L'edizione numero 78 è stata ospitata dal blog Crescere Creativamente di Rosalba Cocco, con l'interessante tema "Disegnate la matematica".Come riporta la stessa maestra Rosalba:"Disegnate la matematica" è il tema […]
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Yet more evidence that the NSA wants to make it impossible to communicate privately.
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A very refreshing email from a PhD candidate from abroad: “Franchement j’ai pas lu encore vos papiers en détails, mais j’apprécie vos axes de recherche et j’aimerai bien en faire autant  avec votre collaboration, bien sûr. Actuellement, je suis à la recherche d’un sujet de thèse et c’est pour cela que je vous écris. Je […]
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Ya han salido las segundas clasificaciones parciales de los Premios Bitácoras 2014, en los que Gaussianos participa en la categoría Mejor Blog de Ciencia. En dicha categoría Gaussianos ha bajado de la tercera a la quinta posición. Los cinco primeros puestos son los siguientes: Dimetilsulfuro Ciencia de sofá Ese Punto Azul Pálido La pizarra de […]Entra en Gaussianos si quieres hacer algún comentario sobre este artículo, consultar entradas anteriores o enviarnos un […]
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FINAL CFP and EXTENDED DEADLINE: SoTFoM II `Competing Foundations?', 12-13 January 2015, London. The focus of this conference is on different approaches to the foundations of mathematics. The interaction between set-theoretic and category-theoretic foundations has had significant philosophical impact, and...
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10 + 1 - 7 = 1 * 4 Also: 1 + 0 + 1 = 7 - 1 - 4 Also: 10 = 1 + 7 + (1 * √4) Also: 10 = (|1 - 7| - 1) * √4
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The Oxford Algorithms Day will take place on the 15th April 2015. It's the latest in a series of one-day algorithms meetings that have been held on an ad-hoc basis at various UK universities that have algorithms/computational complexity research groups. Below is a list of previous similar events, most of which have better acronyms than this one.2014 (MAD): http://www.cs.mdx.ac.uk/foundations/middlesex-algorithms-day-mad-2014/2013 (QMAD) : […]
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A metric space has the binary intersection property if every collection of closed balls has nonempty intersection unless there is a trivial obstruction: the distance between centers of two balls exceeds the sum of their radii. In other words, for every family of points and numbers such that for all there exists such that for […]
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Sólo unas breves líneas para recordar que ya se conocen los ganadores del Premio a la mejor entrada del Carnaval de Matemáticas en su Edición 5.6: Erdős.Y el ganador esEn el infinito, las cosas no son lo que parecen, de El zombi de Schrödinger.con un total de 4+4+4+2+1+1+1 = 17 puntos. Aquí dejo el distintivo del ganador.El resto de entradas votadas, así como los premios obtenidos los podéis leer en la entrada Premios de la "Edición 5.6: Paul Erdős" del Carnaval de Matemáticas […]
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Por la presente os informo de que la próxima edición del Carnaval de Matemáticas correspondiente al mes de Octubre, será la Edición 5.7: Alan Turing, tendrá lugar del 20 al 26 de Octubre y se celebrará en El Zombi de Schrödinger.La forma de participar en la Edición 5.6: Paul Erdős del Carnaval de Matemáticas es la habitual. Tienes que escribir un post en tu blog cuya temática esté relacionada con las matemáticas, y en donde hay que mencionar de forma expresa que tu entrada […]
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Let $R$ be a ring and $M$ an $R$-module with a finite free resolution (an “FFR module”). That is, there exists an exact sequence $0\to F_n\to F_{n-1}\to \cdots\to F_0\to M\to 0$ with each $F_i$ a finitely generated free $R$-module. If we denote by $r_i$ the rank of $F_i$, then the Euler characteristic of $M$ is […]

### October 16, 2014

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[Here is a revised version of my comments on the paper by Julien Stoehr, Pierre Pudlo, and Lionel Cucala, now to appear [both paper and comments] in Statistics and Computing special MCMSki 4 issue.] Approximate Bayesian computation techniques are 2000’s successors of MCMC methods as handling new models where MCMC algorithms are at a loss, […]
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Arrivo con un giorno di ritardo, ma ieri è stato l'Ada Lovelace Day, giornata dedicata alla celebrazione dei successi delle donne nei campi della scienza, della tecnologia, dell'ingegneria e della matematica.Ricordiamo Ada, la prima programmatrice di computer, con un semplice saluto — ovviamente scritto in Ada.
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Relacionar el talento matemático con la cantinela de la tabla de multiplicar, o con la facultad de recordar los números premiados de la lotería, es una ligereza equivalente a la de afirmar la falta de dotes literarias de una persona, no por ser incapaz de escribir poemas como Juan Ramón Jiménez o novelas como Gabriel […]Entra en Gaussianos si quieres hacer algún comentario sobre este artículo, consultar entradas anteriores o enviarnos un mensaje.Construye tú […]
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10 - (1 * 6) = 1 * 4 Also: 10 - 1 - 6 + 1 = 4 Also: 10 = (|1 - 6|) * 1 * √4 Also: 1 + 0 + 1 = (6 * 1) - 4
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The past few weeks I’ve been dabbling in some toric geometry, and the following result in toric geometry puzzled me when I first read it: The only smooth projective toric Fano surfaces are . If you are as ignorant about toric geometry as I am (i.e. you’ve looked at Cox–Little–Schenck’s marvellous book but not much […]