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August 27, 2014

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1:00 PM | Regents Recap — June 2014: Common Core Algebra Structure
Here is another installment in my series reviewing the NY State Regents exams in mathematics. June, 2014 saw the administration of the first official Common Core Regents exam in New York state,  Algebra I (Common Core).  Roughly speaking, this exam replaces the Integrated Algebra Regents exam, which is the first of the three high school level math […]
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1:00 PM | Buying a reputation
It is almost always a mistake to make too much of the Emmys. All awards are overrated but Oscars and Tonys do still bring a critical and commercial boost. The Emmys are little more than an expensive pissing contest between network executives. It is, however, a very expensive pissing contest. Lots of money goes into ads and PR accounts so some executives can feel better about themselves on Monday (or in this case, Tuesday) morning. West of the 110, those "For Your Emmy Consideration" […]
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12:57 PM | Ankündigung: Mathe-Familien-Tag
Mathematik für die ganze Familie – das wird der Mathe-Familien-Tag am 6. September in Berlin! An vielen unterschiedlichen Stationen kann man einen Nachmittag lang spielen, bauen, basteln, konstruieren und programmieren. Und das alles kostenlos im Schulgarten Moabit!
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12:32 PM | Aise O’Neil at Gotham Comedy Club
I don’t usually blog about my kids, but my 14-year-old son has explicitly given me his blessing to post his recent stand-up performance at the Gotham Comedy Club: The look he gives the audience at the end is my favorite part.
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12:30 PM | 8/27/14
8 + 2 - 7 = |1 - 4| Also: 82 (mod 7) = 1 + 4 Also: |8 - 2 - 7| = 1^4
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12:18 PM | avernian landscapes (#3)
Filed under: Mountains, pictures, Running, Travel Tagged: Auvergne, Besse-en-Chandesse, countryside, France, Puy de Sancy, Puy-de-Dôme, vacations
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12:01 PM | This Week's Problem
No summary available for this post.
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12:00 PM | Common Core Common Sense: Myths About the Standards, Part 4
In recent months, there’s been a tremendous amount of buzz regarding an educational change called Common Core. And a ton of that buzz perpetuates down-right false information. There’s so much to say about this that I’ve developed a five-part series debunking these myths — or outright lies, if you’re being cynical. This is the fourth in that […]
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11:59 AM | Gushing over Edpuzzle
So ... yesterday I saw half my students.  We had  a great day.  You can read a snippet about it here - my 180 blog.I gave students a two part homework assignment.  They had to read a short New York Times article on data ... called When the Data Struts Its Stuff.  We collected data using a simple activity on our first day and the purpose of the homework was to emphasize the importance of data analysis in our world.  Students will answer a few questions in their […]
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11:22 AM | #itwist14 and CfP: Biomedical and Astronomical Signal Processing (BASP) Frontiers 2015
The twitter handle you currently want to follow is that of iTWIST ( international Traveling Workshop on Interactions between Sparse models and Technology ) that is taking place right now, it is: #itwist14Also Yves Wiaux sent me the following:Hi IgorCould I ask you to post this conference announcement on Nuit Blanche?Thanks a lot in advanceCheersYvesHere is the announcement:***Re: Biomedical and Astronomical Signal Processing (BASP) Frontiers 2015 at baspfrontiers.orgDear ColleaguesAbstract […]
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11:07 AM | Winding map and local injectivity
The winding map is a humble example that is conjectured to be extremal in a long-standing open problem. Its planar version is defined in polar coordinates by All this map does it stretch every circle around the origin by the factor of two — tangentially, without changing its radius. As a result, the circle winds […]
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11:00 AM | August 27, 2014
Solution at the bottom of this page.Like this problem? Try our Contest Problem Book series!Exercise your mind daily with a problem from the AMC-8, AMC-10, or AMC-12, provided by Mathematical Association of America's American Mathematics Competitions.
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9:33 AM | Maths at the British Science Festival!
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9:13 AM | The World of Pseudo Academia
Article in the NYTimes about pseudoacademic journals and conferences http://www.nytimes.com/2013/04/08/health/for-scientists-an-exploding-world-of-pseudo-academia.html?smid=tw-share&_r=1&
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9:00 AM | The Mathematical Pirate’s Guide to Factorising Cubics
“Yarr,” said the Mathematical Pirate. “Ye’ll have plundered a decent calculator, of course?” “Er… well, I bought it from Argos, but… aye, cap’n! A Casio fx-83 GT PLUS!” “A fine calculator,” said the Mathematical Pirate. “One that offers you at least three ways to factorise cubics.” “Really!? I thought you needed the silver one for that.” “Pirates deal only in gold.” “Right, right. OK, then, bring it on! I’ve got a cubic here: it’s $2x^3 – 5x^2 […]
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7:52 AM | Small gaps between large gaps between primes results
The big news last year was the quest to find a lower bound for the gap between pairs of large primes, started by Yitang Zhang and carried on chiefly by Terry Tao and the fresh-faced James Maynard. Now that progress on the twin prime conjecture has slowed down, they’ve both turned their attentions toward the opposite question:... Read more »
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7:34 AM | SAGT 2014, 9/30-10/2, Patras, Greece
The 7th International Symposium on Algorithmic Game Theory (SAGT) will take place in Patras, Greece, from September 30 to October 2.  Notice the change in location (from the original Hafa, Israel).
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7:30 AM | Special events and the dynamical statistics of Twitter
A large variety of complex systems in ecology, climate science, biomedicine, and engineering have been observed to exhibit so-called tipping points, where the dynamical state of the system abruptly changes. Typical examples are the rapid transition in lakes from clear to turbid conditions or the sudden extinction of species after a slightly change of environmental conditions. Data and models suggest that detectable warning signs may precede some, though clearly not all, of these drastic events. […]
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7:01 AM | Graph-based video game
Last year, Metrico, an infographic-based puzzle game for the PlayStation Vita, was announced for future release. It's out now. I …Tags: Metrico, video games
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7:00 AM | 7602
7602 = 2 x 3 x 7 x 181. It is a number with exactly 4 distinct palindromic prime factors (A046402).7602 is the product of 42 and the 42nd prime (A033286).7602 is the sum of composite numbers less than the 34th prime (A079725).7602 is a positive integer n such that n11 + 1 is semiprime (A105122).7602 divides 439 - 1.Source: OEIS
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6:50 AM | LA MATEMATICA COME UN ROMANZO: NATO IN UN GIORNO AZZURRO
Continuano le uscite in edicola dei volumi dedicati  alla scoperta dei problemi della matematica e di coloro che li hanno risolti. Le equazioni impossibili, le simmetrie nascoste, i teoremi che nel corso dei secoli hanno intrecciato scienza e filosofia, raccontati attraverso le vite eccezionali di matematici incompresi o tormentati, isolati dal mondo, posseduti da un’ossessione o coinvolti nei grandi eventi della storia.In edicola in questi giorni il libro di Daniel Tammett "Nato in un […]
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6:27 AM | CFP: SoTFoM II 'Competing Foundations?', 12-13 January 2015, London.
The focus of this conference is on different approaches to the foundationsof mathematics. The interaction between set-theoretic and category-theoreticfoundations has had significant philosophical impact, and represents a shiftin attitudes towards the philosophy of mathematics. This conference willbring together leading scholars in these areas to showcase contemporaryphilosophical research on different approaches to the foundations ofmathematics. To accomplish this, the conference has the […]
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5:56 AM | The Expander Mixing Lemma in Irregular Graphs
Today, after a lecture in the spectral graph theory boot camp at the Simons institute, I was asked what the expander mixing lemma is like in graphs that are not regular. I don’t know if I will have time to return to this tomorrow, so here is a quick answer. First, for context, the expander […]
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5:35 AM | Planarization by vertex deletion
Another of my Graph Drawing papers is online today: "Planar Induced Subgraphs of Sparse Graphs", arXiv:1408.5939, with Cora Borradaile and her student Pingan Zhu. It's about finding large planar subgraphs in arbitrary graphs; in the version of the problem we study, we want the planar subgraph to be an induced subgraph, so the goal is to find as large a subset of vertices as possible with the property that all edges connecting them can be drawn planarly. Equivalently, we want to delete as few […]
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5:00 AM | Un ordinateur pour vérifier les preuves mathématiques
Cet article introductif fait écho aux deux exposés donnés par Thierry Coquand et Thomas C. Hales au séminaire Bourbaki du 21 juin 2014. - Echos de la recherche / Hors-piste, Séminaire Bourbaki
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5:00 AM | (x, why?) Mini: Potential
(Click on the comic if you can't see the full image.) (C)Copyright 2014, C. Burke.Would becoming purely kinetic be realizing your potential? This is a new thing that I'm trying, (x, why?) minis. "Mini" as in "minimum", so it has a mathematical context, along with "minimum artwork, background and coloring". I thought about calling them "quickies", but that lacked the math connection and, frankly, this wasn't as quick as I would have liked. Happy Joe Burke Day!, the anniversary of my father's […]
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5:00 AM | Yoshua Bengio"s view on Deep Learning
Following this entry, Yoshua Bengio just wrote the following on his Google+ stream (I have a added a few links and reshaped the text for clearer reading):There was an interesting debate on deep learning at Technion a couple of days ago: http://nuit-blanche.blogspot.fr/2014/08/is-deep-learning-final-frontier-and-end.html I wasn't there but I wished I had been to clarify a number of points. So I wrote this message to the members of the debate panel (sorry, it's pretty […]
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4:49 AM | The leap of faith
This semester I am running all three of my classes as “modified Moore method” courses. (The amount of modification depends on the audience and aims of the course.) During our first meetings, I worked hard to set the right tone and expectations. We even took time to practice what class would look like. But then […]
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4:42 AM | Math Toolkits Part 2: Primary Toolkits
Primary Math Toolkits should be built over the year adding tools as they are introduced.  In the beginning of the year, start with the tools that were introduced in the prior grade. Here are some suggestions for toolkits: 1 container (Ziploc bag, box, big toolbox for a table of students) 1 double dice 2 different […]
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4:00 AM | Letters from a Calculus Class
Dear Student, I’ll put it this way: You don’t seem to understand me yet, but you keep getting closer. -Limits Continue reading →
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