Mathblogging.orgRecent Postshttp://www.mathblogging.org/scripts/feed.php2014-04-20T19:32:35-04:00No copyright asserted over individual posts; see original posts for copyright and/or licensing.Mathblogging.org Atom serializerHappy Easter 2014http://www.mathblogging.org/post/854112014-04-20T12:18:00-04:00(x, why?)(Click on the cartoon to see the full image.)<br /> (C)Copyright 2014, C. Burke.That's only for fresh eggs. It's okay to put hard-boiled eggs in one basket because you want them all to break so you have an excuse to throw them all out! Seriously, I know some people who eat them, but I know few who enjoy them. <BR><BR><br><br><br></br>
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Photohttp://www.mathblogging.org/post/854122014-04-20T12:10:18-04:00UnknownGapshttp://www.mathblogging.org/post/854102014-04-20T11:29:09-04:00dawndupI teach an “Accelerated Grade 7″ math course which covers all of the grade 7 Common Core standards and many of the grade 8 standards. As such, I teach any student who’s ready to take it – I have mostly seventh-graders, but I have a handful of sixth-graders taking it ahead of schedule, and a […]To a Tetrahedral Birthdayhttp://www.mathblogging.org/post/854072014-04-20T10:59:50-04:00Oluwasanya Oluwafemi AweBIRTHDAY CHALLENGE: Try creating a tetrahedron-like structure (regular triangular pyramid) with 20 balls or spheres. Today’s the 20th of April and the birthday of an Evertonian – which explains the image of […]Apps for Making Tenhttp://www.mathblogging.org/post/854082014-04-20T10:40:00-04:00Donna BoucherI walked into a 2nd grade classroom Thursday to find the students busily engaged in math workshop. Several students were working with iPads and playing what looked to be an addictive math game. I sat myself down and asked them to show it to me. The app, Numbers Logic Puzzle, is a Candy Crush-like game for making ten. Players swipe neighboring number tiles that add to 10, causing the tiles to disappear and new tiles to fall into place. When I got home, I downloaded it on my […]Fooled by randomnesshttp://www.mathblogging.org/post/854062014-04-20T09:33:12-04:00AndrewFrom 2006: Naseem Taleb‘s publisher sent me a copy of “Fooled by randomness: the hidden role of chance in life and the markets” to review. It’s an important topic, and the book is written in a charming style—I’ll try to respond in kind, with some miscellaneous comments. On the cover of the book is a […]The post Fooled by randomness appeared first on Statistical Modeling, Causal Inference, and Social Science.Research position on applied dynamical system theory (vacancy number 2014_05)http://www.mathblogging.org/post/854092014-04-20T09:05:15-04:00Unknown4/20/14http://www.mathblogging.org/post/854052014-04-20T08:30:34-04:00Unknown4 - 2 + 0 = 1 * √4
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4! = 20 + (1 * 4)S6.219 - Heart of Goldhttp://www.mathblogging.org/post/854032014-04-20T08:00:04-04:00Unknown<br />SERIES 6 INDEX<br />The Story So Far: After leaving Fractal City, personified math must deal with a wormhole that could bring them to Statistics... help point the way back home... or destroy them outright.<br /><br />"All we need now, is to see if our distance and direction pair can spot mathematics," Dr. Nisano concluded, careful not to speak too loud. "If so, we hop on the gazebo and go!"<br /><br /> <br />Magnitude & Sign reunitedMaud and Signum eyed each other. Then they both extended out an arm, joining hands and
[…]A Common Core Alg Activity Using Desmos - Piecewise Linear Functions and Squareshttp://www.mathblogging.org/post/854022014-04-20T07:29:00-04:00Dave Marain <br /><br /> This is my first attempt to use Desmos, the outstanding free online graphing calculator (and a free iPad app). I'm sure many of you have been utilizing this powerful resource. There are already many available teacher samples you can use.<br /><br /> Let me know if you can view the graph (you may have to adjust the window slightly). More importantly, what do you think of the activity and do you see its potential for deepening understanding of algebra?<br /><br /><br /><br /><br /><br /><br /> If interested in purchasing my NEW […]Sunday Morning Insight: Why You Should Care About Phase Transitions in Clusteringhttp://www.mathblogging.org/post/854042014-04-20T06:57:00-04:00IgorFigure from [1]<br /><br />In the Advanced Matrix Factorization page, I have no listing for the phase transition section of the spectral clustering or its nonlinear cousin subspace clustering. Little did I know that Suresh Venkatasubramanian (from the GeomBlog fame) has written about it in his essay on clustering. In particular, he wrote this interesting entry entitled: Choosing the number of clusters III: Phase Transitions where he draws a connection with statistical
[…]2048 Addictionhttp://www.mathblogging.org/post/854012014-04-20T05:30:00-04:00Sarah Hagan<br />My 2048 High ScoreSigns that you are addicted to 2048<br />You play 2048 during your lunch break at school.You play 2048 during your planning period at school.You have convinced multiple students that they should try their hand at playing the most addicting game on the planet.You gush about the game to your coworkers until they start playing. You convince your sister that she should start playing 2048 so you will have someone to discuss strategy with.You take screen shots of your new high
[…]Traffic Simulation Videohttp://www.mathblogging.org/post/854002014-04-20T04:48:00-04:00Edward RusuTo go along with my last post, here is a video of the traffic simulation. The quality isn't great, but I'm browsing through some video recording software to find the perfect one. Any suggestions would be greatly appreciated! Until then, enjoy :)<br /><br /><br />Diigo Links (weekly)http://www.mathblogging.org/post/853992014-04-20T04:31:08-04:00Glennevangelizing the (digital) natives : Are The Chicago Cubs About to Be Historically Bad? A little t test to see if the Cubs really are as bad as some people claim. Great way to bring sports into the AP Stats class. tags: ap stats ap lessons stats statistics KSTF Teaching Fellowships | Apply to Be […]Alla Lim con i numeri egizi | Giuntihttp://www.mathblogging.org/post/853982014-04-20T02:56:46-04:00Angelo StellaPortare in aula la storia della matematica significa certamente incuriosire e coinvolgere molto i bambini che, affascinati da una “magica” presentazione dell’insegnante, s’immedesimano nei tempi passati, ascoltano con attenzione e sperimentano con gusto mentre la disponibilità ad apprendere e la motivazione ad affrontare l’attività aumentano. Ma sono davvero solo questi i motivi per insegnare matematica […]
Postal de pascuahttp://www.mathblogging.org/post/853972014-04-20T02:00:49-04:00ricardos#11: Wie kam sie zu uns?http://www.mathblogging.org/post/853952014-04-20T01:30:00-04:00Jan-Martin KlingeEin kurzes Zwischenfazit. Über einen langen Zeitraum hinweg schrieben Menschen Dinge auf. Vieles von dem, was sie niederschrieben, waren mündlich überlieferte, seit einiger Zeit tradierte Geschichten. Was dann letztlich aufgeschrieben wurde, war buntgefächert: Von Lyrik und Gedichten über Ahnentafeln und Erzählungen hin zu den Evangelien und Texten über die Apokalypse … weiterlesen → Egg-stra Special Savings!http://www.mathblogging.org/post/853962014-04-20T01:00:00-04:00Donna BoucherThe Easter Bunny hopped on by with treats for the little ones, and now it's your turn! Grab some of my newest products today, April 20, for 20% off and use them in your classroom on Monday!<br /><br />Some of the products on sale are pictured below. Click on any picture to go directly to the product. At my store, search by On Sale under Prices or sort the list by Most Recent to see all sale products.<br /><br /><br /><br /><br /><br /><br /><br /><br />In Praise Of P=NP Proofshttp://www.mathblogging.org/post/853942014-04-20T00:27:00-04:00PipWhy they can be important Advertising source Joe Bloggs is not a computer scientist, at least not one that we know. As noted by Wikipedia, Joe Bloggs is a “placeholder name” like “John Doe” or “Jane Roe” in the US, or “Ashok Kumar” in India. Sometimes real people have or acquire the placeholder names: Ashok […]Getting Credit (or blame) for Something You Didn’t Do (BP oil spill)http://www.mathblogging.org/post/853922014-04-19T22:42:16-04:00Deborah Mayo  Four years ago, many of us were glued to the “spill cam” showing, in real time, the gushing oil from the April 20, 2010 explosion sinking the Deepwater Horizon oil rig in the Gulf of Mexico, killing 11, and spewing oil until July 15.(Remember junk shots, top kill, blowout preventers?)[1] The EPA has lifted its gulf drilling ban on BP just […]Good Homework Sheetshttp://www.mathblogging.org/post/853932014-04-19T22:11:53-04:00drnickinewtonHere is a great site for homework and quizzes.   Happy Mathing, Dr. Nicki  Finding the area of a trianglehttp://www.mathblogging.org/post/853902014-04-19T21:52:00-04:00MooMoo MathThere are several methods for finding the area of a triangle. Here is a infographic listing five of these based on information you are provided. <br /><br /> Please share this infographic if you enjoy it. <br /><br /><iframe frameborder="0" height="1917" scrolling="no" src="https://magic.piktochart.com/embed/1767427-area-triangle" style="overflow-y: hidden;" width="600"></iframe><br /><br /><br />Generalizing an already tough integralhttp://www.mathblogging.org/post/853892014-04-19T21:20:32-04:00rlgordonma@yahoo.comI did the case $p=1$ here. The generalization to higher $p$ may involve higher-order derivatives as follows: $$\begin{align}K_p &= \int_0^{\pi/2} dx \frac{x^{2 p}}{1+\cos^2{x}} = \frac1{2^{4 p-1}} \int_{-\pi}^{\pi} dy \frac{y^{2 p}}{3+\cos{y}} \end{align}$$ So define, as before, $$J(a) = \int_{-\pi}^{\pi} dy \frac{e^{i a y}}{3+\cos{y}} $$ Then $$K_p = \frac{(-1)^p}{2^{4 p-1}} \left [\frac{d^{2 p}}{da^{2 p}} J(a) \right ]_{a=0}$$ […]The Surface Area of a Spherehttp://www.mathblogging.org/post/853912014-04-19T21:15:15-04:00jwilson828How do you help your students make sense of the formula for the surface area of a sphere? We started with an orange that was spherical. We talked about a great circle, and we used string to draw some great circles for the sphere on a piece of paper. If we peel the orange, and […]Problemi per Pasqua 2014http://www.mathblogging.org/post/853862014-04-19T21:00:05-04:00Maurizio CodognoStavolta i problemi sono da Aha! Solutions, di Martin EricksonThe post Problemi per Pasqua 2014 appeared first on Il Post.Aria Di Festa- Pasqua 2014http://www.mathblogging.org/post/853832014-04-19T20:44:00-04:00annarita ruberto<br><br>Il 2014 è il settimo anno di Scientificando, di Matem@ticaMente e di Web 2.0 and somethingelse, i miei blog.<br><br>Anche quest'anno voglio augurare una Serena Pasqua a tutti e, per l'occasione, ho scelto "Aria di festa", un brano tratto dai Malavoglia di Giovanni Verga. Un brano dal sapore retrò, che fa pensare alle cose buone di un tempo passato, di cui dovremmo conservare la memoria per tramandarla alle future generazioni. Molti di noi non hanno vissuto quell'atmosfera
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[…]Αναγκαστικά ισομετρίαhttp://www.mathblogging.org/post/853842014-04-19T20:12:57-04:00Mihalis KolountzakisΜια συνεχής συνάρτηση από ένα συμπαγή μετρικό χώρο στον εαυτό του έχει την ιδιότητα ότι δε μικραίνει τις αποστάσεις: Για κάθε έχουμε (εδώ είναι η μετρική του χώρου ). Δείξτε ότι η είναι ισομετρία: για κάθε . (Αν έχετε πρόβλημα με την έννοια “συμπαγής μετρικός χώρος” […]On This Day in Math - April 20http://www.mathblogging.org/post/853852014-04-19T19:30:00-04:00Pat Ballew<br /><br />Questions that pertain to the foundations of mathematics, although treated by many in recent times, still lack a satisfactory solution. The difficulty has its main source in the ambiguity of language.<br />~Giuseppe Peano<br /><br />The 110th day of the year; The sum of the first 110 primes has only two prime factors. 2+3+5+7+....+599 + 601 = 29897 = 7 X 4271<br /><br />EVENTS1543 Copernicus’ De Revolutionibus published, "in his An Annotated Census of Copernicus' De Revolutionibus Owen Gingerich writes, 'The printing was […]Conceptualizing Drillshttp://www.mathblogging.org/post/853872014-04-19T19:08:00-04:00Nat BantingI have students in an enriched class that demand for me to give them more practice. I tell them that we practice mathematics with daily class activities. They don't want practice, they want repeated practice. They are accustomed to receiving repeatable drills to cement understandings. <br />I have learned to compromise with this demand. I do believe there is a place for basic skills training in mathematics, and would raise an eyebrow at anyone who claims these unnecessary. I do, however, also
[…]Den of thieves [book review]http://www.mathblogging.org/post/853822014-04-19T18:14:56-04:00xi'anLast month, I ordered several books on amazon, taking advantage of my amazon associate gains, and some of them were suggested by amazon algorithms based on my recent history. As I had recently read books involving thieves (like Giant Thief, or Broken Blade and the subsequent books), a lot of titles involved thieves or thievery […]