Mathblogging.orgRecent Postshttp://mathblogging.org/scripts/feed.php20150828T10:37:2904:00No copyright asserted over individual posts; see original posts for copyright and/or licensing.Mathblogging.org Atom serializerMr. B's BrainO Quiz # 22http://mathblogging.org/post/12757520150828T03:30:0004:00David8/28/2015<br /><br /><br /> <br />Mr. B’s “BRAINO” QuizGuaranteed to unclog clogged up
[…]Inequality in Rectanglehttp://mathblogging.org/post/12759620150828T03:24:0304:00UnknownPoint I lies within the rectangle ABCD. Lines AI, BI, CI, DI meet the sides of the rectangle in points M, N, P, Q. Prove that AI+BI+CI+DI is not less than MI+NI+PI+QI.Minimum Wage Machine pays in pennieshttp://mathblogging.org/post/12757420150828T03:01:3004:00Nathan YauCrank to earn a penny every 4.5 seconds.Tags: minimum wage, perspectiveAn Open Letter and a Note of Gratitudehttp://mathblogging.org/post/12757320150828T02:35:4004:00Megan Schmidt“I’ve been married for fortytwo years which means I’ve been to fortytwo state fairs.” I’m not sure why this little tidbit from the ParkandRide attendant didn’t instantly put me in great spirits. And then I walked up over the hill, took one look at MathonaStick, and the indifference melted. The humble smile of satisfaction from Christopher […]QI Card Shuffling  52 Factorialhttp://mathblogging.org/post/12757220150828T01:11:0004:00UnknownStephen Fry explains that a standard deck of cards can be shuffled in 52! different ways.4.1.18http://mathblogging.org/post/12757020150828T01:00:0004:00Arseniy Akopyan
Figures sans paroles
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Les figures sans parolesMash: Fast genome distance estimation using the MinHash algorithm  implementation http://mathblogging.org/post/12757120150828T01:00:0004:00Igor<br /><br /><br />In this Sunday Morning Insight: What Happens When You Cross into P Territory ?, I mentioned this article on using LSH for genome alignment from long read technology (PacBio RS II or Oxford Nanopore MiNion).<br />Assembling Large Genomes with SingleMolecule Sequencing and Locality Sensitive Hashing by Konstantin Berlin, Sergey Koren, ChenShan Chin, James Drake, Jane M Landolin, Adam M Phillippy<br />while assembling the genome is important, with cheap and fast long reads, the goalpost is now slowly moving
[…]TGIFhttp://mathblogging.org/post/12756820150828T00:50:2104:00abrandnewlineThank God it’s Friday. She’s a nice lady for making it so because I really only have one day left in me.Cancellation is a Painhttp://mathblogging.org/post/12756920150828T00:30:2804:00RJLipton+KWReganHow to avoid the pain of estimating tough sums Cricketing source Andrew Granville is a number theorist, who has written—besides his own terrific research—some beautiful expository papers, especially on analytic number theory. Today Ken and I wish to talk about his survey paper earlier this year on the size of gaps between consecutive primes. The […]The Loop Game: Pool in Elliptical Tablehttp://mathblogging.org/post/12756720150828T00:12:5304:00Guillermo BautistaMathematics enthusiast and author Allex Bellos has created an elliptical pool table and he named it “The Loop Game.” It was supposed to always make the ball go to the table pocket. This can be done by placing the pocket at one of the foci and hitting the ball placed on the other focus. This is easy to […]
Math and Multimedia  School math, multimedia, and technology tutorials.
Renew your CMS membership today!http://mathblogging.org/post/12758820150828T00:00:0004:00UnknownThe CMS recognizes the important role members play in strengthening the Canadian mathematics community and relies on the continued support of its members. Members help support CMS programs and activities, including meetings, math camps, national prizes and awards, competitions, such as the International Mathematical Olympiad (IMO), and publications. Renew your membership online by clicking more.Octahedral Moondoghttp://mathblogging.org/post/12756620150827T22:57:0004:00Math TouristLocated in the National Gallery of Art's Sculpture Garden, Tony Smith's Moondog is based on a lattice of tetrahedral and octahedral components (15 stretched octahedra and 10 tetrahedra). As described by George Hart, you can think of the structure as part of a diamond crystal lattice, with the smaller tetrahedral faces (visible as equilateral triangles) representing carbon atoms and the[DMANET] SI of Springer CASM (Thomson Reuters Indexed) on Modeling Complex Communication Networkshttp://mathblogging.org/post/12759920150827T22:49:0004:00Lance Fortnowhttp://www.casmodeling.com/about/update/COMM_NETS<br>**NEW** Thomson Reuters indexed in the Web of Science (ESCI) starting<br>November 2015Thematic series on modeling largescale/complex communication networks using<br>complex networks and agentbased modeling techniques<br>Complex Adaptive Systems Modeling welcomes submissions to the new thematic<br>series on Modeling largescale communication networks using complex networks<br>and agentbased modeling techniques.Key features of Springer CASMDeadline for
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[…]Bayesian inference in a nut...baghttp://mathblogging.org/post/12756420150827T22:13:1004:00Daniel LakelandSuppose you are in a Kindergarten class, and you have a bag containing 100 mixed nuts, Brazil, Walnut, Almond, Hazelnut, etc. Now one of the children reaches in, pulls out a nut, and tells you what kind it is. How much does it weigh? Let's make the assumption that the nuts remaining are not radically […]Août 2015, 4ème défihttp://mathblogging.org/post/12756520150827T22:00:0004:00Ana RechtmanDéfi du calendrier mathématique 2015 : petit problème à résoudre….

Défis du Calendrier Mathématique
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ActualitéThe first week or sohttp://mathblogging.org/post/12756320150827T20:42:0004:00KathrynI've been in my new job for 8 days. It's been a huge adjustment and I am most definitely not in love with the new job yet. <br /><br />The first four days back were just for staff. I spent that time trying to make inroads with the teachers I'll be supporting this year. I visited classrooms, offered my help, and was asked a barrage of questions that I mostly couldn't answer. Thursday night was back to school night, though it was really more of a meetandgreet because we didn't […]#MTBoSBlaugust 27: Go Formative ... a cool site!http://mathblogging.org/post/12756120150827T20:42:0004:00Beth FergusonToday I introduced absolute value functions using estimating the gallons of coffee in the world's largest coffee cup 3act math task. Kids got into the activity!<br /><br />Then we practiced building absolute value functions  identifying the two linear functions; restricted the domain and range, and wrote the absolute value function. We used +Formative ! It was awesome!<br /><br />Activities are super easy to build. From the teacher's view you can see the whole class, mark work, and […]curiosamathematica:
The sums of the reciprocals of the binomial...http://mathblogging.org/post/12755820150827T20:06:5604:00Unknown<br/> <br/><br/> <br/>curiosamathematica:
The sums of the reciprocals of the binomial coefficients over successive diagonals in Pascal’s triangle converge into beautiful patterns, apart from the first and second diagonal (which lead to the series 1 + 1 + 1 + 1 + … and the harmonic series, respectively).
A proof of the identity can be found on cuttheknot.org.
Via. http://mathblogging.org/post/12755920150827T20:00:1204:00Unknown<br/><br/>Via. Natural language processing of new jokes from 2015http://mathblogging.org/post/12757720150827T20:00:0004:00UnknownThis is a brief update to a previous post: “Python, natural language processing
and predicting
funny”.
In that post I carried out some basic natural language processing with Python to
predict whether or not a joke is funny. In this post I just update that with
some more data from this year’s Edinburgh Fringe
festival.
Take a look at the ipython
notebook which shows graphics and outputs of all the jokes.
Interestingly this year’s winning joke is not deemed funny by the basic model
[…]Multiple Representations v. Best Representationhttp://mathblogging.org/post/12756020150827T19:41:3504:00Dan MeyerThis is from a worksheet I assigned during my last year in the classroom: There are lots of good reasons to ask students for multiple representations of relationships. But I worry that a consistent regiment of turning tables into equations into graphs and back and forth can conceal the fact that each one of these […]29 Going On 30http://mathblogging.org/post/12755720150827T19:38:0004:00Joe Schwartz This September marks the start of my 30th year teaching. What was happening 29 years ago, September 1986?<br /><br /><br />President Ronald Reagan, midway through his second term, appointed Trenton, New Jersey native Antonin Scalia to the United States Supreme Court. He is now the court's longest serving justice.<br />The Oprah Winfrey Show made its national television debut.<br />"Crocodile" Dundee was released. It was the second highest grossing film of the year, right behind Top
[…]On This Day in Math  August 28http://mathblogging.org/post/12755620150827T19:00:0004:00Pat Ballew<br /><br />As long as algebra and geometry have been separated, their progress have been slow and their uses limited; but when these two sciences have been united, they have lent each mutual forces, and have marched together towards perfection. <br />~Joseph Louis Lagrange<br /><br /><br />The 240th day of the year; 240 has more divisors (20 of them) than any previous number. What would be the next number that has more?<br /><br />240 is the product of the first 6 Fibonacci numbers 240 = 1*1*2*3*5*8 *Derek
[…]beyond subjective and objective in Statisticshttp://mathblogging.org/post/12755420150827T18:15:5504:00xi'an“At the level of discourse, we would like to move beyond a subjective vs. objective shouting match.” (p.30) This paper by Andrew Gelman and Christian Henning calls for the abandonment of the terms objective and subjective in (not solely Bayesian) statistics. And argue that there is more than mere prior information and data to the […]Trying againhttp://mathblogging.org/post/12755320150827T18:08:1904:00Thomas LumleyThis graph is from the Open Science Framework attempt to replicate 100 interesting results in experimental psychology, led by Brian Nozek and published in Science today. About a third of the experiments got statistically significant results in the same direction as the originals. Averaging all the experiments together, the effect size was only half that […]Google Summer of Code 2015http://mathblogging.org/post/12755120150827T16:48:0004:00adminGeoGebra Summer of Code 2015 This summer, GeoGebra was again part of Google Summer of Code (GSoC) supporting young and talented open source coders. We had a very strong field of 64 students applying and were able to choose 4…Read more ›
Strade senza finehttp://mathblogging.org/post/12755020150827T16:46:2804:00UnknownA piedi e spensierato mi avvio verso la strada aperta,<br/>Sano, libero, il mondo dietro di me,<br/>Il lungo bruno percorso davanti a me che conduce ovunque io scelga.La letteratura on the road viene fatta iniziare con Sulla strada di Jack Kerouac, romanzo che è anche (forse soprattutto) un punto di riferimento per la letteratura beat. Il fatto che i protagonisti, tra una avventura e l'altra (nessuna delle quali poi così edificante), siano in viaggio nel classico coast to coast, l'equivalente […]August 2015 Geometry (Common Core) Regents: Parts 3 and 4http://mathblogging.org/post/12754920150827T16:41:0004:00(x, why?)Here are the questions, with answers and explanations, for the New York State Geometry (Common Core) Regents exam, Parts 3 and 4. There were 3 questions in Part 3, each worth 4 credits. There were 2 questions in Part 4, each worth 6 credits. Partial credit may be earned. All work must be shown. In general, a correct answer without any work is worth 1 credit, unless that answer is given as a choice and an explanation is required. Link to Part 1Link to Part 2 Part 3 32. As shown in the diagram
[…]Math Practice Standard Portfolioshttp://mathblogging.org/post/12754820150827T15:32:0004:00Tina CAt our standards based grading implementation meeting the teacher working with us from the charter school asked about how we wanted to include the CCSSM Standards of Mathematical Practice. At the time we weren't sure but I've done some more thinking:<br /><br />Last year I asked PreCalc kids to journal sometimes on which one they'd used that day. They referred to posters I have in the back of the room to choose one. I never asked Algebra 1 kids to do the same, but they're fully capable of […]PHQ, congratulations again.http://mathblogging.org/post/12754620150827T15:21:3504:00Peter Smith  The Pavel Haas Quartet’s recording of the Dvorak G major and “American” Quartets won the Gramophone Award for Chamber music for 2011, and not only that, the disc won overall Recording of the Year. Their next disc, Schubert’s “Death and the … Continue reading →