Mathblogging.orgRecent Postshttp://www.mathblogging.org/scripts/feed.php2014-08-27T13:06:33-04:00No copyright asserted over individual posts; see original posts for copyright and/or licensing.Mathblogging.org Atom serializerMaths at the British Science Festival!http://www.mathblogging.org/post/971792014-08-27T05:33:16-04:00mf344
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The World of Pseudo Academiahttp://www.mathblogging.org/post/971782014-08-27T05:13:47-04:00anelimArticle 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&The Mathematical Pirate’s Guide to Factorising Cubicshttp://www.mathblogging.org/post/971732014-08-27T05:00:00-04:00Colin“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
[…]Small gaps between large gaps between primes resultshttp://www.mathblogging.org/post/971772014-08-27T03:52:36-04:00Christian PerfectThe 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 »SAGT 2014, 9/30-10/2, Patras, Greecehttp://www.mathblogging.org/post/971692014-08-27T03:34:29-04:00Noam NisanThe 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).Special events and the dynamical statistics of Twitterhttp://www.mathblogging.org/post/971682014-08-27T03:30:16-04:00DanPA 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.
[…]Graph-based video gamehttp://www.mathblogging.org/post/971722014-08-27T03:01:17-04:00Nathan YauLast year, Metrico, an infographic-based puzzle game for the PlayStation Vita, was announced for future release. It's out now. I …Tags: Metrico, video games7602http://www.mathblogging.org/post/971672014-08-27T03:00:00-04:00Mathematical Association of America7602 = 2 x 3 x 7 x 181. It is a number with exactly 4 distinct palindromic prime factors (A046402).<br /><br />7602 is the product of 42 and the 42nd prime (A033286).<br /><br />7602 is the sum of composite numbers less than the 34th prime (A079725).<br /><br />7602 is a positive integer n such that n11 + 1 is semiprime (A105122).<br /><br />7602 divides 439 - 1.<br /><br /><br />Source: OEISLA MATEMATICA COME UN ROMANZO: NATO IN UN GIORNO AZZURROhttp://www.mathblogging.org/post/971712014-08-27T02:50:00-04:00Claudio PasquaContinuano le uscite in edicola dei volumi dedicati alla scoperta dei problemi della matematica e di coloro che li hanno risolti.<br /><br /> <br /><br />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.<br /><br />In edicola in questi giorni il libro di Daniel Tammett "Nato in un
[…]CFP: SoTFoM II 'Competing Foundations?', 12-13 January 2015, London.http://www.mathblogging.org/post/971662014-08-27T02:27:00-04:00Richard PettigrewThe focus of this conference is on different approaches to the foundations<br />of mathematics. The interaction between set-theoretic and category-theoretic<br />foundations has had significant philosophical impact, and represents a shift<br />in attitudes towards the philosophy of mathematics. This conference will<br />bring together leading scholars in these areas to showcase contemporary<br />philosophical research on different approaches to the foundations of<br />mathematics. To accomplish this, the conference has the […]The Expander Mixing Lemma in Irregular Graphshttp://www.mathblogging.org/post/971702014-08-27T01:56:46-04:00lucaToday, 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 […]Planarization by vertex deletionhttp://www.mathblogging.org/post/971622014-08-27T01:35:22-04:00UnknownAnother 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 […](x, why?) Mini: Potentialhttp://www.mathblogging.org/post/971652014-08-27T01:00:00-04:00(x, why?)(Click on the comic if you can't see the full image.)<br /> (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
[…]Yoshua Bengio"s view on Deep Learninghttp://www.mathblogging.org/post/971612014-08-27T01:00:00-04:00Igor<br />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):<br />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
[…]The leap of faithhttp://www.mathblogging.org/post/971642014-08-27T00:49:49-04:00TJThis 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 […]Math Toolkits Part 2: Primary Toolkitshttp://www.mathblogging.org/post/971632014-08-27T00:42:18-04:00drnickinewtonPrimary 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 […]Letters from a Calculus Classhttp://www.mathblogging.org/post/971602014-08-27T00:00:40-04:00Ben OrlinDear Student,
I’ll put it this way: You don’t seem to understand me yet, but you keep getting closer.
-Limits Continue reading →Game Theory In The News (August 2014)http://www.mathblogging.org/post/971552014-08-26T23:00:06-04:00Presh TalwalkarThis is the current installment of the monthly series “Game Theory in the News.” My hope is to highlight stories that can be used as case studies in the classroom, both so students can see how to apply game theory and so teachers can make class material easier to relate to. You can get these […]Labor Dayhttp://www.mathblogging.org/post/971582014-08-26T22:35:57-04:00LeslieIn this short activity, students learn the meaning and history of Labor Day as they look for patterns emerging from the Labor Day dates over more than past years. Students then use those observed patterns to predict future dates of…Read more →College Bound…http://www.mathblogging.org/post/971592014-08-26T22:33:04-04:00Joanie SilvermanTonight, as I am packing the last few items in the duffels that will accompany my daughter to college tomorrow, I remember each “first day” of her progression from kindergarten through 12th grade. The rites of back-to-school were always the same; trips to the uniform store convincing her that polyester skorts with elasticized waists were […]Magic carpethttp://www.mathblogging.org/post/971542014-08-26T22:17:34-04:00UnknownSubmitted by TheFrankensTeam:
In the model you can change the number of dots and the deviation too. If you set the “type demo” to dynamic it will make possible to analyse how the wave-pattern changes when deviation grows.
Base Ten Blocks Make Algebra Child's Playhttp://www.mathblogging.org/post/971572014-08-26T22:16:00-04:00Crewton Ramone's Blog Of Math<br />Base Ten Blocks Make Advanced Algebra Child's Play. For those of you wondering if the work I do with younger kids makes a difference when they are older...that picture was taken with some very young students (8 and 9 years) who at the time were learning much more about 8 + 8 and 8 x 8, and that 64 is square, than they were about algebra. <br /><br />This post will eventually be on one of the password protected pages (Advanced Algebra) but you are getting these videos here for FREE. Eventually, this post […]The Q Factor: Adding Quality to Our Questionshttp://www.mathblogging.org/post/971502014-08-26T21:27:00-04:00Donna Boucher<br />One of the neat things about being an educational blogger is that you get to connect with educators across the country and even the world. This past summer I attended the Teachers Pay Teachers conference in Las Vegas, and I had the extreme pleasure of meeting Greg Coleman, aka Mr. Elementary Math. Naturally, we hit it off, and I knew that collaboration would be in our future. Tonight, I present my very first guest post, written by Greg.
[…]A fun surprise with Euler’s identity coming from Manjul Bhargava’s generalized factorialshttp://www.mathblogging.org/post/971492014-08-26T21:14:40-04:00mjlawlerEarlier this week I wrote about a really neat paper by one of the 2014 Fields Medalists Manjul Bhargava. My original post is here: Fibonacci Factorials and Bhargava’s fascinating paper is here: The Factorial Function and Generlizations I was thinking … Continue reading →The use of fraktur in mathhttp://www.mathblogging.org/post/971472014-08-26T20:56:13-04:00SixWingedSeraphThis post is a revision of the part of the abmath article on alphabets concerning the fraktur typeface, followed by some corrections and remarks. Fraktur In some math subjects, a font tamily (typeface) called fraktur, formerly used for writing German, Norwegian, and some other languages, is used to name math objects.  The table below shows […]N-RN.3 (Real Number System) - Irrational Behaviorhttp://www.mathblogging.org/post/971512014-08-26T20:53:00-04:00(x, why?)A short entry for tonight. Moving on to another Common Core Algebra standard brings me to N-RN.3, which reads <BR> Explain why the sum or product of two rational numbers is rational; that the sum of a rational number and an irrational number is irrational; and that the product of a nonzero rational number and an irrational number is irrational. The key word here is "explain". Before we do that, let's establish that the rest of the standard is true: if you add two rational numbers, you will get an
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[…]AP Stats – Better learning this yearhttp://www.mathblogging.org/post/971482014-08-26T20:20:22-04:00Glennvia I have done some things differently this year in AP Stats that have paid off tremendously. I realized it today when I put up a Barron’s flashcard as a warmup and although almost everyone got it wrong, everyone in the entire class could describe the graphs correctly. The words; uniform, symmetric, bimodal, unimodal, skewed […]A joke but not a hoaxhttp://www.mathblogging.org/post/971532014-08-26T20:15:00-04:00Mark<br /><br /><br />From Valerie Strauss<br /><br /><br />April 25, 2014<br /><br />Dear Kindergarten Parents and Guardians,<br /><br />We hope this letter serves to help you better understand how the demands of the 21st century are changing schools, and, more specifically, to clarify, misperceptions about the Kindergarten show. It is most important to keep in mind is [sic] that this issue is not unique to Elwood. Although the movement toward more rigorous learning standards has been in the national news for more than a decade, the changing face of
[…]Opportunities and challenges in experimental mathematicshttp://www.mathblogging.org/post/971522014-08-26T20:14:29-04:00David H Bailey“Experimental mathematics” has emerged in the past 25 years or so to become a competing paradigm for research in the mathematical sciences. An exciting workshop entitled Challenges in 21st Century Experimental Mathematical Computation was held at the Institute for Computational and Experimental Research in Mathematics (ICERM), July 21-25, 2014, which explored emerging challenges of experimental Continue reading Opportunities and challenges in experimental mathematics
Sign failhttp://www.mathblogging.org/post/971442014-08-26T20:08:31-04:00Maiu