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# Posts

### November 11, 2013

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In one of his posts, my friend Larry mentioned that popular posts had to mention the Bayes/frequentist opposition in the title… I think mentioning machine learning is also a good buzzword to increase the traffic! I did spot this phenomenon last week when publishing my review of Kevin Murphy’s Machine Learning: the number of views […]
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Ho letto il terzo libro che mancava nella mia libreria di Giulia Carcasi, ma, dispiace ammetterlo, quello meno bello. Di facile lettura, scorrevole, si legge facilmente e velocemente. Una storia d'amore con tante sfaccettature, una storia di quotidianità e di stranezze, di grandi promesse e piccoli accorgimenti. Ecco, il libro che mi è piaciuto di meno della Carcasi, ma non per questo non si tratta di un bel libro. Semplice, delicato, scorrevole, si potrebbe leggere in un […]
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I have attended some events devoted to “math appreciation”; those events tend to attract several people with different levels of knowledge of mathematics, and the topics covered tend to be broad enough to hopefully satisfy a large audience. I then … Continue reading →
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Various people and organisations tweet historical scientific facts or events of the day, one of these is the Mathematical Association of America under the Twitter handle @maanow. Today they tweeted the following: Tycho Brahe first observed a supernova in the … Continue reading →
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Filed under: pictures, Travel Tagged: Croatia, door, wood, Šibenik
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La dimostrazione per induzione si basa sul principio di induzione, secondo cui: (...) se $\mathcal{P}$ è una proprietà che vale per $k \in \mathbb{N}$, e se $\mathcal{P}(n) \Rightarrow \mathcal{P}(n+1)$ per ogni $n \ge k$, allora $\mathcal{P}$ vale $\forall n \in \mathbb N$ con $n \ge k$. In simboli: $(\forall P)[P(0) \land ( \forall k \in \mathbb{N}) (P(k) \Rightarrow P(k+1))] \Rightarrow ( \forall n \in \mathbb{N} ) [ P(n) ]$ dove $k$ e $n$ sono numeri naturali. I passi su […]
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Guido Imbens and I write: The statistical and econometrics literature on causality is more focused on “effects of causes” than on “causes of effects.” That is, in the standard approach it is natural to study the effect of a treatment, but it is not in general possible to define the causes of any particular outcome. […]The post Why ask why? Forward causal inference and reverse causal questions appeared first on Statistical Modeling, Causal Inference, and Social […]
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Let σ(n) be the sum of the positive divisors of n and let gcd(a, b) be the greatest common divisor of a and b. Form an n by n matrix M whose (i, j) entry is σ(gcd(i, j)). Then the…Read more ›
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Hi Cathy, I met you this past summer, you may not remember me. I have a question. I know a lot of people who know much more math than I do and who figure out solutions to problems more quickly than me. Whenever I come up with a solution to a problem that I’m really […]
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Dean Burnett is a neuro-scientist who has a blog on Guardian Science Blogs, Brain Flapping, that is usually fairly humorous and mostly satirical.  However last week he decided to take a pot shot at astrology that was rather banal, displaying, … Continue reading →

### November 10, 2013

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Today, Ewan Cameron arXived a paper that generalises our Robert and Marin (2010) paper on the measure theoretic difficulties (or impossibilities) of the Savage-Dickey ratio and on the possible resolutions. (A paper of mine’s I like very much despite it having neither impact nor quotes, whatsoever! Until this paper.) I met Ewan last year when […]
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Should mathematical societies refuse to cooperate with the NSA and GCHQ?
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Filed under: pictures, University life Tagged: bois de Boulogne, clouds, La Défense, Paris, Université Paris Dauphine
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OK, fine. Maybe they could work Stan on to the show next? I thought I could retire once I’d successfully inserted the phrase “multilevel regression and poststratification” into the NYT, but now I want more more more. Maybe a cage match between Stan and Mister P on the Itchy and Scratchy show?The post Schiminovich is on The Simpsons appeared first on Statistical Modeling, Causal Inference, and Social Science.