Mathblogging.orgRecent Postshttp://mathblogging.org/scripts/feed.php2015-11-26T18:07:29-05:00No copyright asserted over individual posts; see original posts for copyright and/or licensing.Mathblogging.org Atom serializerUsing Kate Nowak’s rotated parabola with kidshttp://mathblogging.org/post/1342232015-11-26T10:09:03-05:00mjlawlerSaw a Kate Nowak exercise via a Dan Anderson tweet earlier in the week: and wrote about an estimation problem coming from that picture that I thought was fun: A fun estimate question inspired by Kate Nowak I thought it would be fun to see what the boys thought about the rotated parabola, so this…Solving for Xmas: how to make mathematical Christmas cardshttp://mathblogging.org/post/1342122015-11-26T09:36:43-05:00UnknownSolving for Xmas: how to make mathematical Christmas cards: Vicky Neale:Christmas is a fantastic opportunity for me to share some maths with friends and family. One of my favourite ways to do this is by stitching geometrical designs on cards. The magic is how the straight lines produce perfect curves.“iPredict to close after Govt refuses anti-money laundering law exemption”http://mathblogging.org/post/1342142015-11-26T09:32:17-05:00AndrewRichard Barker points us to an update on ipredict, the New Zealand political prediction market. From the news article by Hamish Rutherford: The site, run by Victoria University of Wellington’s commercialisation arm, VicLink, issued a statement to its website and on Twitter on Thursday. According to the iPredict statement, Associate Justice Minister Simon Bridges refused […]
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[…]Honest errors take down math paperhttp://mathblogging.org/post/1342132015-11-26T09:30:30-05:00Shannon PalusAn incorrect proof has felled a math paper. There’s not too much to say in a straightforward situation like this one, which we’ve seen before — the result of honest errors, not any malfeasance. Here’s the abstract for “Spectral mapping theorem for generalized Kato spectrum:” In this paper, we give an affirmative answer to Mbekhta’s conjecture (Mbekhta, […]
The post Honest errors take down math paper appeared first on Retraction Watch.Russisch vermenigvuldigenhttp://mathblogging.org/post/1342112015-11-26T09:19:00-05:00Willem van RavensteinPythagoras januari 1981
11/26/15http://mathblogging.org/post/1342082015-11-26T08:30:27-05:00Unknown11 = (2 * 6) - 1^5Also:|1 + 1 + 2 - 6| = √(|1 - 5|)The Richard Price Societyhttp://mathblogging.org/post/1342092015-11-26T08:18:44-05:00xi'anAs an item of news coming to me via ISBA News, I learned of the Richard Price Society and of its endeavour to lobby for the Welsh government to purchase Richard Price‘s birthplace as an historical landmark. As discussed in a previous post, Price contributed so much to Bayes’ paper that one may wonder who […]"As God as my witness..." is my second favorite Thanksgiving episode line [Repost]http://mathblogging.org/post/1342072015-11-26T08:00:00-05:00Mark<br /> <br />If you watch this and you could swear you remember Johnny and Mr. Carlson discussing Pink Floyd, you're not imagining things. Hulu uses the DVD edit which cuts out almost all of the copyrighted music. . <br /><br />As for my favorite line, it comes from the Buffy episode "Pangs" and it requires a bit of a set up (which is a pain because it makes it next to impossible to work into a conversation).<br /><br />Buffy's luckless friend Xander had accidentally violated a native American grave yard and, in addition to […]Meshed Columnhttp://mathblogging.org/post/1342062015-11-26T07:00:00-05:00Math TouristUntitled sculpture by Linda Howard, University of North Florida, Jacksonville, Florida.
For other sculptures by Linda Howard, see "Geometreks in New Orleans" and "Centerpeace."
For another example of public art at the University of North Florida, see "A Flight of Tetrahedra."
Photos by I. Peterson“Proof School” For Math Kidshttp://mathblogging.org/post/1342052015-11-26T06:28:16-05:00tomcircleOriginally posted on Math Online Tom Circle:<br />To overcome the USA general school low Math standard, there are some elite schools to groom the gifted students such as this “Proof School”: San-Fancisco new “Proof School” for Math kids The Math…[DMANET] CFP: 2016 IEEE WCCI/CEC Theory Special Sessionhttp://mathblogging.org/post/1342152015-11-26T05:44:00-05:00Lance FortnowCALL FOR PAPERS WCCI/CEC 2016 Special Session on<br> Theoretical Foundations of Bio-inspired Computation July 25 - 29, 2016, Vancouver, Canada *** Paper submission deadline: January 15, 2016 *** Website: https://hpi.de/friedrich/conf/cec2016.html==========<br>Motivation<br>==========Bio-inspired search heuristics often turn out to be highly successful<br>for optimization in practice. The theory of these randomized search<br>heuristics explains</br>
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[…][DMANET] 2nd IEEE International Conference on Smart Computing (SMARTCOMP 2016) - Call for Papershttp://mathblogging.org/post/1342162015-11-26T05:08:00-05:00Lance Fortnow**********************<br>Call for Papers<br>**********************2nd IEEE International Conference on Smart Computing (SMARTCOMP 2016)* <br>"Smart Living through Computing"May 18-20, 2016 | St. Louis, Missouri, USA http://smart-comp.org Co-Sponsored by IEEE Computer Society, IEEE St Louis section, and<br>Missouri University of Science and Technology*pending IEEE approvalSmart computing is emerging as an important multidisciplinary area,<br>which can be broadly classified into two major topics: how</br>
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[…]Si no lo veo no lo creohttp://mathblogging.org/post/1342042015-11-26T05:00:39-05:00^DiAmOnD^De entrada, quiero decir que no me gusta hablar “mal” de profesores universitarios. En general, me inspiran mucho respeto tanto por lo que han trabajado para llegar ahí como por la labor que realizan, tanto en las clases como en sus investigaciones. Pero, por desgracia, tengo que volver a comentar un caso que por su […]Where do old issues of MSOR Connections live online these days?http://mathblogging.org/post/1342022015-11-26T04:57:19-05:00Peter RowlettChristian Lawson-Perfect asks: Where do old issues of MSOR Connections live online these days? @peterrowlett? — Christian Perfect (@christianp) November 26, 2015 It’s complicated, but here is what I know. Volumes 1-12 (actually 0-12, if you include the ‘Maths, Stats and OR’ newsletter published in 2000 as volume 0) were published by the Maths, Stats... Read more »Ask Clever Hans a questionhttp://mathblogging.org/post/1342032015-11-26T04:16:00-05:00Christian Lawson-PerfectI’ve put a very clever horse on the internet. He’s called Hans and I’ve made a little video about him. (Update: looks like that video’s missing basically everything. The recording is on my laptop at home, so I can’t fix it until tonight. Boohoo!) You can ask Clever Hans your own questions! Go to christianp.github.io/clever-hans and make sure your microphone... Read more »Fundamental Group of Torus (van Kampen method)http://mathblogging.org/post/1342012015-11-26T04:06:37-05:00mathtuition88There are various methods of computing fundamental groups, for example one method using maximal trees of a simplicial complex (considered a slow method). There is one “trick” using van Kampen’s Theorem that makes it relatively fast to compute the fundamental … Continue reading →[DMANET] [JMDA16] Discrete Mathematics Days (First announcement)http://mathblogging.org/post/1342172015-11-26T03:30:00-05:00Lance Fortnow======================<br> Discrete Mathematics Days<br> Barcelona, 6-8 July 2016http://llati.upc.edu/JMDA16/<br>======================<br>1st Announcement<br>======================(apologies for multiple copies)We are pleased to announce the Discrete Mathematics Days meeting,<br>to be held in Barcelona 6-8 July 2016.This will be the 10th edition of the Jornadas de Matemática Discreta y<br>Algoritmica (JMDA), the Spanish biannual meeting on discrete mathematics.Topics of interest include: Algorithms and Complexity,
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[…]Happy Thanksgivinghttp://mathblogging.org/post/1342002015-11-26T03:30:00-05:00David11/26/2015:<br /><br />11,262,015 is a composite, odd, deficient, and when written in binary using only 1s and 0s.<br /><br />It is the short leg of a Pythagorean triangle: 11,262,015^2 + 1,764,562,728^2 = 1,64,562,719^2. Remember this one for the SAT.<br /><br />On the Fifth Day of Thanksgiving My Grandma Gave to Me<br />Five __________ ___________,<br />Four Crescent Rolls,<br />Three Servings of of Stuffing,<br />Two Turkey Legs,<br />and a Pumpkin Pie in my tummy.<br /><br />Question: What did my grandma give to me on the Fifth Day of Thanksgiving?<br /><br /><br /><br />DavidTriangle Jitterbug: Up to Eight Versionshttp://mathblogging.org/post/1341992015-11-26T02:56:26-05:00Zachary Abel[This is post #24 in a mini-blog-post series for NaBloPoMo 2015. Jump to the first or previous post.] We began describing Straws Thingy’s shape as 5 intersecting tetrahedra, so it is fitting that the two asymmetries we’ve identified so far (color scheme and mirror image) depend only on these tetrahedra. Yesterday’s interloper, by contrast, requires … Continue reading Triangle Jitterbug: Up to Eight Versions →[DMANET] Call for chapters - Springer Volume - "Modelling, Computing and Data Handling Methodologies for Maritime Transportation"http://mathblogging.org/post/1342182015-11-26T02:03:00-05:00Lance FortnowCall for Volume Chapters in Series "Advances on Learning, Analytics and Intelligent Computing Systems" published by Springer Volume Title: "Modelling, Computing and Data Handling Methodologies for Maritime<br>Transportation" Purpose Maritime transportation is the major conduit of international trade. In<br>terms of cost, maritime transport is very competitive against land and<br>airborne transport, increasing only by a few percent the total product cost.<br>On the other hand, maritime</br>
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[…]Flip the Class?http://mathblogging.org/post/1341982015-11-26T01:28:47-05:00jnewman85I’ve heard pro’s and con’s of “flipping” a classroom (basic idea: having students watch videos of lectures at home and doing “homework” or practice problems at school instead). Here are a few that come to mind: Pros Low student HW … Continue reading →IntMath Newsletter: Rankbrain, Wallis, log-log and scalarshttp://mathblogging.org/post/1341972015-11-26T01:20:56-05:00MurrayIn this Newsletter:
1. Math in the news <br />
2. Resource: Semilog and log-log page<br />
3. Is a 1x1 matrix a scalar?<br />
4. Math puzzles<br />
5. Math movies: Comics that ask "what if?" <br />
6. Final thought: Just do it!
The post IntMath Newsletter: Rankbrain, Wallis, log-log and scalars appeared first on squareCircleZ.
Related posts:
Wallis, pi and quantum theory A quite remarkable new proof of the 400 year-old...
IntMath Newsletter: Cultural math, visual stats, matrices and persistence In this
[…]Happy Thanksgiving 2015http://mathblogging.org/post/1341962015-11-26T01:00:00-05:00(x, why?)(Click on the comic if you can't see the full image.)<br /> (C)Copyright 2015, C. Burke.It's actually 3 1/8 pecans because cutting 1/7 of a pecan is as impossible as cutting .141592... pecans. Actually, it's more likely that a pecan was split in half and then cut four more times to make 8 pieces, but they wouldn't exactly be actually pieces of eight. Happy Thanksgiving to you and yours! <BR><BR><BR><BR><BR>Come back often for more funny math and geeky comics.<br><br><br></br>
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Conjugacy classes of finite index subgroupshttp://mathblogging.org/post/1341952015-11-26T00:40:43-05:00Qiaochu YuanPreviously we learned how to count the number of finite index subgroups of a finitely generated group . But for various purposes we might instead want to count conjugacy classes of finite index subgroups, e.g. if we wanted to count isomorphism classes of connected covers of a connected space with fundamental group . There is also […]Last Update: Nov. 25, 2015http://mathblogging.org/post/1341942015-11-25T20:57:00-05:00Unknown
Last Update: Nov. 25, 2015
Opinion 148: Leo Corry's Masterpiece "A Brief History of Numbers" Says as Much about the Future as About the Past of Mathematics
(Written: Nov. 25, 2015)
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Prominent nutrition researcher Marion Nestle retracting recent articlehttp://mathblogging.org/post/1341932015-11-25T20:30:17-05:00Alison McCookProminent nutrition expert Marion Nestle is pulling an opinion piece she recently co-authored in the Journal of Public Health Policy following revelations that the piece contained multiple factual errors and failed to reveal her co-author’s ties to one of the subjects of the article. The article, “The food industry and conflicts of interest in nutrition research: A […]
The post Prominent nutrition researcher Marion Nestle retracting recent article appeared first on
[…]A Meta-Curriculumhttp://mathblogging.org/post/1341922015-11-25T19:29:04-05:00dkane47I’ve been working to develop what I’m calling a meta-curriculum: a set of supplemental activities that push students to think about the why and how of learning math. Why is math worth learning? How do students learn best? Right now I have four different parts to the curriculum. None of these are meant to be one-offs; instead, these […]On This Day in Math - November 26http://mathblogging.org/post/1341912015-11-25T19:00:00-05:00Pat Ballew<br />One of the chief duties of a mathematician in acting as an advisor to scientists is to discourage them from expecting too much of mathematicians.<br />~Norbert Wiener<br /><br />The 330th day of the year; if all the diagonals of an eleven sided regular polygon were drawn, they would have 330 internal intersections. <br />A set of 11 points around a circle provide the vertices for 330 quadrilaterals.<br />330 is the sum of five consecutive squares, or of six consecutive primes. <br /><br />EVENTS<br />1607 John Harvard, founder of […]pseudo slice samplinghttp://mathblogging.org/post/1341882015-11-25T18:15:06-05:00xi'anThe workshop in Warwick last week made me aware of (yet) another arXiv posting I had missed: Pseudo-marginal slice sampling by Iain Murray and Matthew Graham. The idea is to mix the pseudo-marginal approach of Andrieu and Roberts (2009) with a noisy slice sampling scheme à la Neal (2003). The auxiliary random variable u used […]Mathbreakers Special Offer!http://mathblogging.org/post/1341902015-11-25T18:12:06-05:00BonWatch a demo video and get a coupon promo code for $4 off Mathbreakers!