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12:00 AM | On This Day in Math - November 27

Mathematics education is much more complicated than you expected, even though you expected it to be more complicated than you expected.~ Edward Griffith BegleThe 331st day of the year; 31, 331, 3331, 33331 are all prime. What percentage of the numbers 33....331 are prime? Is there a pattern? A nice symmetric pic from Jim Wilder@wilderlab:331 is also the sum of five consecutive primes. It is both a centered Pentagonal number and a centered Hexagonal number.EVENTS1727 Isaac Greenwood began his […]

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7:25 PM | ICM2014 (Seoul): Zhang YiTang

Originally posted on Math Online Tom Circle:ICM2014 (VideoSeries LC7): Yitang Zhang A conversation between Yitang Zhang and Daniel Goldston — who is one of the team GPY: Simplified Prime Gap Video Explanations: Video 1 – https://youtu.be/vkMXdShDdtY Video 2 (extra)…

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7:24 PM | Don’t blame the maths teacher

Ok Shanghai, you’re great. We’re in awe. Your methods are indeed successful and I wish to God that all our maths teachers had subject knowledge like you guys do. But I seem to be having a memory lapse. I can’t for the life of me think about how maths teaching got to where it is … Continue reading →

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7:12 PM | MPM2D - Day 54: Factoring, Day 2

The algebra tiles were waiting on students' desks as they walked in this morning, but as we had not finished what we started yesterday, the tiles had to wait. My students were not impressed with common factoring binomials. Even with pumpkins and happy faces.And then I really made things worse with this:We did a little work on the whiteboard to try to figure out how to deal with this case. They game me numbers, we worked out x - y and y - x. We talked about what was the same and what was
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Shanghai teaching method 'could improve UK results within four years': Sally Weale:The government’s controversial experiment with Shanghai mathematics teaching in English schools could pay dividends with improved test results within four years, according to one leading expert.

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The maths teachers of Shanghai have the perfect formula for learning: Nick Gibb:Earlier this month, I welcomed 68 secondary mathematics teachers from Shanghai to England. They had just touched down to spend three weeks teaching in our secondary schools. Now in its second year, the Shanghai-England teacher exchange is one of the most valuable education initiatives undertaken by our government over the past few years.

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5:52 PM | Cevian Parallelogram

In triangle ABC, let M, N, P be the feet of the cevians AM, BN, CP through point D. For any such point D, there exists point S such that the four points M, N, P, S form a parallelogram

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5:52 PM | Pedal Parallelogram

In triangle ABC, let M, N, P be the pedal points of point D. For any such point D, there exists point S such that the four points M, N, P, S form a parallelogram

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Decimal Place Value = Poster/Anchor Chart with Cards for Students A anchor chart to put on your Math Vocabulary board to use as a reference. Along with cards to use as bookmarks for a quick reference the cards are also GREAT to glue into the students Math […]
Related Math Games:
Fractions! = Poster & Anchor Chart with Cards for Students
Mixed Number = Poster/Anchor Chart with Cards for Students
How Can I Multiply a Fraction = Poster/Anchor Chart with Cards for Students

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Just to share a very inspiring motivational video from YouTube. Not sure which movie it is from. (any readers know, please comment below as I would be interested) Highly suitable for students (and their parents) who have just completed their … Continue reading →

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Saw 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…

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Solving 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.

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11:28 AM | “Proof School” For Math Kids

Originally posted on Math Online Tom Circle: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…

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There 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 →

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6:28 AM | Flip the Class?

I’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 →

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In this Newsletter:
1. Math in the news
2. Resource: Semilog and log-log page
3. Is a 1x1 matrix a scalar?
4. Math puzzles
5. Math movies: Comics that ask "what if?"
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
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12:00 AM | On This Day in Math - November 26

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.~Norbert WienerThe 330th day of the year; if all the diagonals of an eleven sided regular polygon were drawn, they would have 330 internal intersections. A set of 11 points around a circle provide the vertices for 330 quadrilaterals.330 is the sum of five consecutive squares, or of six consecutive primes. EVENTS1607 John Harvard, founder of […]

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11:12 PM | Mathbreakers Special Offer!

Watch a demo video and get a coupon promo code for $4 off Mathbreakers!

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10:53 PM | Is a 1×1 matrix a scalar?

A 1x1 matrix is often regarded as a scalar quantity, but is that correct? This article explores a reader's question.
The post Is a 1×1 matrix a scalar? appeared first on squareCircleZ.
Related posts:
Updated matrix interactive Here's an applet where you can investigate how matrix...
Matrix operations applet Here's some mathematical background to the matrix operations applet here...
Multiplying matrices This article points to 2 interactives that show how to...
Inverse of a matrix by
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Unizor - Creative Minds through Art of Mathematics - Math4TeensNotes to a video lecture on http://www.unizor.comSpheres - Problems 2Just as a reminder, here are a few formulas related to spheres. They are all derived in the previous lectures and are helpful in solving these problems.Volume of a sphere: 4πR³/3Surface area of a sphere: 4πR²Volume of a cap: πH²(3R−H)/3Surface area of a dome: 2πRHVolume of a sector: 2πR²H/3ProblemGiven a sphere of some unknown radius.A cylindrical hole […]

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8:27 PM | 5 Maths Gems #44

Hello and welcome to my 44th gems post. This is where I share maths teaching ideas I've seen on Twitter.
1. Problems by Topic
I've often featured links to problem solving resources in my posts but these are rarely organised by topic. This means we have to trawl through mixed packs of problems to find something suitable for our lessons. Bravo to Leanne Shaw (@LeanneShawAHS) for creating a very

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Directions: Using the following squares, how many different rectangles can you make? How does adding 4 more squares change the problem?Filed under: Geometry, Open Middle Tagged: 2nd Grade, open middle, rectangles, shapes, squares

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8:06 PM | Helping Students Visualize Skew

This week during my statistics classes’ final review time for their term final, I had a small idea I wish I’d had years ago. Early in the course, we talked about means and medians as centers of data and how these … Continue reading →

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7:40 PM | Making a Difference

It is always wonderful to hear when what you do makes a difference, and I wanted to share with my readers the wonderful email I recently received from a student who took a university course (Designs for Learning Mathematics: Elementary — a “how to teach math to kids” course) with me a few years back. […]

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7:30 PM | Potluck Math

I was talking to one of my co-workers about a “Friendsgiving” she is holding, and how the food bill is getting up there as more people are invited. But some of those people are also bringing food – and everyone is worried about having enough. I realized this is a very common problem with potluck […]

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7:18 PM | Methoden-Mindmap

Diesen Freitag beende ich ein großes Projekt: Mit meinem Technikkurs habe ich – nach intensiver Beschäftigung mit der Elektronik – unterschiedliche Radios gebaut. Die Schüler hatten einen Bausatz als Vorlage und haben diesen völlig individuell modifiziert und erweitert. Jetzt sitze ich an den Planungen für die nächsten Wochen und Monate. Zusätzlich zu sehr aufregenden Inhalten, die das Fach Technik bietet, gibt es hier eine Vielzahl von Methoden zu beachten, die alle ihre Vor- und
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Si tenemos claro que… “Multiplicaciones y divisiones se realizan antes que sumas y restas” no nos pasará lo que le ha ocurrido a esta concursante de un programa de la televisión china. Si es que, es lo que repito cada día…Read more →

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di diffusione della scienza e rivoluzioni cc @aubreymcfato @CristianCantoro Utilizzare i dati sulle citazioni in Wikipedia per misurare la diffusione dell'open accessScrivevo all'inizio del 2011 per i festeggiamenti del wiki-decennale di una rivoluzione irreversibile. E' stato piuttosto interessante leggere il titolo che technology review ha utilizzato per raccontare dell'ultimo degli articoli dedicati all'enciclopedia libera: Why Wikipedia + Open Access = Revolution.L'idea degli autori, Misha
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Nielsen, F. (2007). Scientific citations in Wikipedia, First Monday, 12 (8) DOI: 10.5210/fm.v12i8.1997

Heather Ford, Shilad Sen, David R. Musicant & Nathaniel Miller (2013). Getting to the source: where does Wikipedia get its information from?, Proceedings of the 9th International Symposium on Open Collaboration, DOI: 10.1145/2491055.2491064

Misha Teplitskiy, Grace Lu & Eamon Duede (2015). Amplifying the Impact of Open Access: Wikipedia and the Diffusion of Science, Wikipedia Workshop at 9th International Conference on Web and Social Media (ICWSM), arXiv: 1506.07608v1

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After (or before?) @StartsWithABang's balloon animals' post? A couple of week ago Ethan Siegel published a post about ballon animals, so I decide to repost an old piece that I wrote in 2011 for my italian blog: the english version is lost, but it is magically reposted here! Two one-balloon constructions and their associated graphsI recently discovered this interesting site, vihart. In the site there are some interesting paper and today I want to write something about Computational Balloon
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Demaine E.D., Demaine M.L. & Hart V. (2008). Computational balloon twisting: The theory of balloon polyhedra., Proceedings of the 20th Canadian Conference on Computational Geometry (CCCG2008), 139-142.

Bryś K. & Lonc Z. (2009). Polynomial cases of graph decomposition: A complete solution of Holyer's problem, Discrete Mathematics, 309 (6) 1294-1326. DOI: 10.1016/j.disc.2008.01.054

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Supponiamo di doverci confrontare con un animale, ad esempio un cane o un lupo (o più in generale con un animale, addomesticato o selvaggio). Secondo Konrad Lorenz il comportamento aggressivo di un cane viene influenzato da due stati d'animo differenti: l'ira e la paura.Si può allora provare a prevedere il comportamento del cane in funzione di quale dei due stati domina: nel caso in cui l'animale è dominato da paura o da ira, proporre una previsione è abbastanza semplice; nel caso in cui il […]

Zeeman E.C. (1976). Catastrophe Theory, Scientific American, 234 65-83. DOI: 10.1038/scientificamerican0476-65

Jean Petitot (2013). Complexity and self-organization in Turing, The Legacy of A.M. Turing, (E. Agazzi, ed.), Franco Angeli, Milano, 149-182. arXiv: 1502.05328v1

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Non prevedevo di scrivere la versione italiana di un post sull'ultima news proveniente dal RHIC, ma mi è stato gentilmente chiesto, e provvedo ben volentieri. Inizio, però, con un piccolo cappello, alla fine del quale saprete che c'è anche un piccolissimo pezzetto (il doppio diminutivo è perché i firmatari del papero su arXiv sono veramente tanti) d'Italia in questa interessante scoperta.Tutto nasce da un post, nel flusso twittero, di Annalisa Arci, in cui racconta, in maniera e con un […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv, arXiv: 1504.02175v2

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A new clue about the #quarkgluonplasma from @RHIC_STAR at @BrookhavenLabWithin the particles that constitute atomic nuclei, protons and neutrons, there are the quarks, the elementary particles with fractional charges, linked to each other thanks to the gluons, bosons that carry the nuclear interaction. Thanks to the gluons it is impossible to observe, at present, free quarks, but it is expected that in the very first stage of the universe, matter was in a state called quark-gluon plasma. Thanks […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv: 1504.02175v2

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CardColm tweeted: @CardColm

RT @ArsenaultBenoit: Why Do People Favor Opinion Over Scientific Evidence? https://t.co/Kh3vJ9U0PN HT @BaderNutrition #scicomm #science htt…

2015-11-27 14:44:28

CardColm tweeted: @CardColm

RT @FightJunkSci: #AntiVaxx rhetoric puts us all at risk... https://t.co/mae161hFBO #GetVaccinated #VaccinesWork https://t.co/sQ4ZVnYfAI

2015-11-27 14:43:30

CardColm tweeted: @CardColm

RT @MiaFarrow: My kids were vaccinated on schedule. All but one. He was 6 when adopted. Polio found him first. Vaccinate your kids https://…

2015-11-27 14:39:57

CardColm tweeted: @CardColm

2015-11-27 14:39:30

michiexile tweeted: @michiexile

Researchers being jack of ALL trades: today I started editing some video for an upcoming presentation…

2015-11-27 14:36:29

ricardosaenz tweeted: @ricardosaenz

Por si se andan animando a comprar una cámara.
No, no necesitas una cámara réflex por Navidad
https://t.co/KQmVbVJuss

2015-11-27 14:25:46

rmathematicus tweeted: @rmathematicus

RT @AtomicHeritage: 11/27/41: V. Bush sends Roosevelt final NAS report, which agrees building an atomic bomb is feasible. https://t.co/rDxj…

2015-11-27 14:22:24

rmathematicus tweeted: @rmathematicus

RT @ChemistryWorld: Countdown continues with Lüer's syringe. Stay tuned for the 100th #ClassicKit later today
https://t.co/dKS3dOvWc2 https…

2015-11-27 14:21:02

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