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Posts

April 19, 2014

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4:37 PM | Saturday Morning Videos: ICLR Videos and Papers
The folks at ICLR 2014 are releasing videos of the meeting. The whole channel of the meeting is here. Here is a sampling of interest with attendant reviews and papers: ICLR 2014 Talk: "Revisiting Natural Gradient for Deep Networks" by Razvan Pascanu and Yoshua Bengio.Attendant review of the paper.    ICLR 2014 Talk: "Exact solutions to the nonlinear dynamics of learning in deep linear neural networks" by Andrew M. Saxe, James L. McClelland, Surya Ganguli Attendant […]
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4:14 PM | mathani: Get you best paper, cut a circle and fold it so that...
mathani: Get you best paper, cut a circle and fold it so that the circumference falls on a fixed point inside. Repeat, using random folds. Now see the creases. This is how you paper-fold an ellipse.
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4:08 PM | How I Slayed The Mathematical Beast-Monster by Karla Gabruch
Egan…Each semester, on the last day of class, I make prospective elementary school mathematics teachers hand in a Duo-Tang, which contains their weekly math homework and their weekly discussion points (one page responses based on required readings from our text). Ultimately, the Duo-Tang assignment is an ongoing collection of “work” intended to capture prospective elementary school math teachers’ thinking with respect to mathematics and mathematics education over the […]
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3:49 PM | First earth-sized exoplanet found in habitable zone.
Astronomers have found the first Earth-sized planet located in the habitable zone of a star — the right distance away to host liquid water and possibly life. Story here. The system is only about 500 light years away. This of course raises the issue of the Fermi paradox: if there...
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2:37 PM | Proof of Divisibility By 6
After discussing divisibility by 5, we proceed to divisibility by 6. A number is divisible by 6 if (1) it is even (2) it is divisible by 3 The explanation to this is quite simple. First, if a number is … Continue reading → The post Proof of Divisibility By 6 appeared first on Proofs from The Book.
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2:22 PM | Escher Scrabble
Escher Scrabble   by Andy Wells   http://im-possible.info/english/art/sculpture/andy-wells.html
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2:11 PM | Weekend reads: How to rescue science, what “censorship” really means, worst paper of the year?
Another very busy week at Retraction Watch. There were a lot of gems elsewhere. Here’s a sampling: Biomedical research in the U.S. must be rescued, write four heavy hitters in PNAS. It’s “time to confront the dangers at hand and rethink some fundamental features of the US biomedical research ecosystem.” “If you’re yelled at, boycotted, […]
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1:27 PM | Index or indicator variables
Someone who doesn’t want his name shared (for the perhaps reasonable reason that he’ll “one day not be confused, and would rather my confusion not live on online forever”) writes: I’m exploring HLMs and stan, using your book with Jennifer Hill as my field guide to this new territory. I think I have a generally […]The post Index or indicator variables appeared first on Statistical Modeling, Causal Inference, and Social Science.
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12:37 PM | Timely April math … Easter, Passover, Boston Marathon, Earth Day, Patriots Day
Read more →
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12:30 PM | 4/19/14
4 - 1 = √9 * 1^4 Also: 4 - 1 = √9 = |1 - 4| Also: 4! = 19 + 1 + 4 Also: 41914 is a palindrome
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12:01 PM | RIPasso di MATEMATICA | Ripmat
Questo sito e’ dedicato a chi ha qualche difficolta’ con la matematica: la matematica non deve complicarci la vita ma aiutarci a viverla meglio. Se hai qualche difficolta’ significa che nella tua carriera scolastica hai recepito qualcosa in modo sbagliato oppure lacunoso; spero che questo sito ti aiuti a capire dove sbagli ed a superare […]
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11:54 AM | beer factory
Filed under: pictures, Travel, Wines Tagged: Belgian beer, Belgium, brewery, Leuven, MCQMC2014, Stella Artois
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11:51 AM | Minimal Criminale | Matematica ecc.
Il Teorema dei quattro colori è piuttosto noto: “data una superficie piana suddivisa in regioni connesse, quattro colori sono sufficienti per colorarla in modo tale che regioni adiacenti abbiano colori diversi”. Nel folklore matematico, esso è anche noto come “il primo enunciato dimostrato da un computer”. Ma tale appellativo non rende certo giustizia ad un […]
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11:43 AM | Aunt Pythia’s advice
Great to be here, and glad you came. Please hop on the nerd advice column bus for another week of ridiculous if not damaging guidance from yours truly, Aunt Pythia. And please, after enjoying today’s counsel to other poor, unsuspecting fools: think of something to ask Aunt Pythia at the bottom of the page! By the way, […]
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11:28 AM | Activity- Airplane in front of the moon
Back in 2011, Nordin Zuber posted this found image on MathsLinks.
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10:07 AM | Mathematics teaching in China: reflections from an Ofsted HMI
By Sean Harford HMI, National Director, Initial Teacher Education, Ofsted Reposted from TES Connect. In late February I was a member of a delegation representing HM Government that visited the three Chinese provinces of Shanghai, Beijing and Hubei with a … Continue reading →
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10:00 AM | La matematica contro il jet lag | Galileo
Quante volte ci è capitato di sentirci assonnati, stanchi o confusi una volta giunti a destinazione dopo un lungo viaggio in aereo? E’ il jet lag, chiamato anche discronia circadiana, una condizione clinica che si verifica quando si attraversano diversi fusi orari. Ma, secondo gli scienziati della University o Michigan, c’è un modo per riprendersi […]
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9:30 AM | Statistics: Confidence Interval Projects
This year, I had the privilege to teach a non-AP statistics class for high school juniors and seniors who had finished Algebra 2 and were not enrolled in upper level math courses through our local technology center.  As a small high school, our math department offers 10 sections of math: 4 sections of Algebra 1, 3 sections of Geometry, 2 sections of Algebra 2, and 1 section of an advanced math elective.  Last year, the elective was College Algebra.  This year, it is Statistics. […]
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9:21 AM | Photo
No summary available for this post.
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7:42 AM | Pizza di Pasqua sabina
Come da tradizione della Pasqua trascorsa lontano da casa non potevo mancare di cimentarmi nella preparazione di sua maestà la Pizza di Pasqua sabina.Una delle due è appena passata a miglior vita. Consumata per metà dai miei compagni di corso di teatro e per metà da me medesimo. Tranne una fetta consumata da Zucchero. Lei non ama molto questo dolce.Per la seconda pizza spero di resistere fino alla colazione pasqualina. Dotata quest'anno anche di salame, ma non di frittata con gli […]
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6:03 AM | Normal dense subspaces of products of “omega 1″ many separable metric factors
Is every normal dense subspace of a product of separable metric spaces collectionwise normal? This question was posed by Arkhangelskii (see Problem I.5.25 in [2]). One partial positive answer is a theorem attributed to Corson: if is a normal dense … Continue reading →
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5:00 AM | MoreOrLess: Magic Numbers 18 Apr 14
Do you have a favourite number - one you love, one you think stands out from all the others? Author Alex Bellos joins us to talk about his quest to find the world's favourite number and discuss whether numbers really can be magical, mystical and memorable, or whether it's all mumbo jumbo. Why are odd numbers so appealing? Which number strikes fear into some people's hearts? And why do lists of questions like these always come in threes? This programme was first broadcast on the BBC World […]
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5:00 AM | Elections piège(s) à équation(s)
Si le vote est privé, les votes sont publics. Mais que veut dire public ? - Billets des habitués
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5:00 AM | Saturday Morning Video: Learning Visual Representations at Scale, Vincent Vanhoucke
Learning Visual Representations at Scale by Vincent Vanhoucke (another presentation that features Deep ConvNets; "Astounding" baseline for vision )in the meantime, ccv 0.6 open sources near state-of-the-art image classifier under Creative Commons Join the CompressiveSensing subreddit or the Google+ Community and post there ! Liked this entry ? subscribe to Nuit Blanche's feed, there's more where that came from. You can also subscribe to Nuit Blanche by Email, explore the Big Picture in […]
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4:10 AM | This week in history
The great earthquake of 1906 struck San Francisco on April 18, around 5 in the morning. While the earthquake already caused a lot of damage, it was the subsequent fire that ravaged the city: the earthquake had broken the water pipes, and so it was impossible to fight the fire because the hydrants were not […]
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3:02 AM | 1,000,000
By the way, sometime yesterday this blog received its millionth visit.
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2:57 AM | Meeting myself at 17
For something I’m writing I looked up a newspaper article I was interviewed in in, from June 7, 1989.  Here’s what I had to say: Ellenberg on mathematics: “I always think of it — this is kind of crazy — as a zoo. There are a million different mathematical objects. They are like animals. Some […]
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2:45 AM | Good post on Vox about issues with ordinal variables
This was a very good article tackling the issues of trying to assign an ordinal score to a multi-dimensional variable.  Mark has been saying this for years, already, but it is good to see statements like this coming out of more mainstream groups:The problem with ordinal rankings — and the more variables, the more problems here — is that it implies meaningful differences between one job and the next one that is one ranking below it. You can definitively say that one job pays more than […]
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2:13 AM | centerofmath: The Ulam spiral shows a pattern in the...
centerofmath: The Ulam spiral shows a pattern in the (unpredictable) primes
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12:17 AM | Manipulatives For Two Digit Times One Digit Multiplication.
At Crewton Ramone's House of Math we don't just get multiplication through 9x9 down, we go all the way out to 20X20. Notice I say "get it down" not just memorize. Manipulatives make multiplication easy, so easy, ans so fast that it will look like they have it memorized even if they have to do a little calculation in their heads...with enough practice they will memorize their multiplication facts but instead of it being difficult and hard we make it fun and easy. In this lesson they learn and […]
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