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It’s that time of year again and the holidays are upon us. Whatever your gifting traditions, Wolfram has perfect solutions for the tech lovers on your shopping list. From now until December 6, we are offering Cyber Week savings around the world, including North and South America, Australia, and parts of Asia and Africa. Bring [...]

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04:18
In the fourth video in this series about developing functions to store values over time, I write the loadValue function to retrieve previously stored values. This video uses the code-along style.
Play the video in full screen mode for a better viewing experience.
... read more >>

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Question: Prove that every non-empty open set in is the disjoint union of a countable collection of open intervals. The key things to prove are the disjointness and the countability of such open intervals. Otherwise, if disjointness and countability are … Continue reading →

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7:36 AM | 7 Cardinal Rules in Life

(See more at: http://www.lifehack.org/articles/lifestyle/7-cardinal-rules-life-everyone-should-know-about.html)Filed under: motivational Tagged: motivational

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11:43 AM | Useful Theorem in Introductory Ring Theory

Something interesting I realised in my studies in Math is that certain theorems are more “useful” than others. Certain theorems’ sole purpose seem to be an intermediate step to prove another theorem and are never used again. Other theorems seem … Continue reading →

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6:24 PM | 3 Act Math Task: Draining The Pool

Another post from Tap Into Teen Minds. Enjoy!
Watch a video clip of a pool draining. How long do you think the pool will take to empty completely? How do you know? Then, watch what REALLY happened!
The post Draining The Pool appeared first on Tap Into Teen Minds.

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2:00 PM | NFL Colors

Sean's pick this week is nflcolor by Alan Bindemann.
Let's take this plain old boring football and turn it into one with some team colors:football = imread('football.jpg');
imshow(football); Segment the football... read more >>

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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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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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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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1:44 PM | Interpolation Technique in Analysis

Question: Let belong to both and , with . Show that for all . There is a pretty neat trick to do this question, known as the “interpolation technique”. The proof is as follows. For , there exists such that … Continue reading →

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Background Teachers and textbook authors often need to simplify a real-world problem to pinpoint a specific area to work with—for instance, the examples in a textbook. However, even in real-world engineering, simplifying a problem can bring clarity when our understanding might otherwise drown in a sea of details. In this blog, we will design the [...]

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**Guest post by Cosmin Negru** As a...

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5:48 AM | |HK|=|H||K|/|H intersect K|

Finally, the LaTeX path not specified problem has been solved by WordPress! This post is about how to prove that , where and are finite subgroups of a group . A tempting thing to do is to use the “Second … Continue reading →

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1:54 PM | Swing Low, Sweet Probability: Guessing the results of every match in the 2015 Rugby World Cup

Today's guest blogger is Matt Tearle, who works on our MATLAB training materials here at MathWorks. Originally from New Zealand, Matt was delighted with the All Blacks' recent victory at the 2015 Rugby World Cup. What better way to celebrate than to analyze the results with MATLAB?... read more >>

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Tenim el plaer de compartir amb vosaltres el reportatge sobre Sangakoo a Escola Pia de Sarrià emès el dissabte 21 de novembre al programa Catakrac de BTV. Ens agrada especialment perquè els absoluts protagonistes són els alumnes de l’escola. Ells el presenten, el protagonitzen i ens expliquen en primera persona quines són les seves experiències creant i […]

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7:28 PM | Lecture Learning vs. Active Learning

Another post from Tap Into Teen Minds. Enjoy!
This past week, Justin Reich referenced research and said "it is almost unethical to use lecturing in a control group when comparing with active learning."
The post Lecture Learning vs. Active Learning appeared first on Tap Into Teen Minds.

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Recently, there is a “latex path not specified” WordPress LaTeX bug, it is very weird. Some LaTeX expressions will get rendered and some will not. Will have to postpone my math blogging till it is fixed. Testing: , , , … Continue reading →

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Today's guest pick of the week from Loren is GISMO. GISMO is one of the success stories for community developed tools. Currently maintained by Glenn Thompson, it is a toolbox widely used throughout the research community of seismologists.
... read more >>

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Strategy: Doubles Plus 1, Doubles minus 1 = 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. Also included is a 24inch x 36inch (poster […]
Related Math Games:
Doubles Anchor Chart with Cards for Students
Fractions! = Poster & Anchor Chart with Cards for Students
Addition Strategies Anchor Chart with Cards for Students

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How would you describe the shape of a loaf of bread? What about the shape of a very thin slice from that loaf? Such simple everyday objects or tasks may […]

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2:07 PM | Another conversation about The Arrow Way

A little more with my second-grade son, age 7, about how he does addition and subtraction, compared with “the Arrow Way” from EngageNY. “Would you rather do an addition problem or a subtraction problem?” “Ummmmm…” “Alright I’ll pick one of each. Tell me how to do 39 + 23.” “It equals 62.” “How did you […]

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Paintings of the great masters are among the most beautiful human artifacts ever produced. They are treasured and admired, carefully preserved, sold for hundreds of millions of dollars, and, perhaps not coincidentally, are the prime target of art thieves. Their composition, colors, details, and themes can fascinate us for hours. But what about their outer [...]

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7:30 PM | How Should We Talk to AIs?

Not many years ago, the idea of having a computer broadly answer questions asked in plain English seemed like science fiction. But when we released Wolfram|Alpha in 2009 one of the big surprises (not least to me!) was that we’d managed to make this actually work. And by now people routinely ask personal assistant systems—many [...]

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12:33 PM | Educación en valores

Claro que también podríamos hablar de los valores de la educación. ¿Por qué no? Siempre hay que dar la vuelta a la hoja. Probablemente veremos que la otra cara no está escrita y queda libre para escribir lo que uno siente y quiere, en vez, de lo que te dicen que debes leer y aceptar. […]

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12:11 AM | The Arrow Way

On the way home tonight, my second-grade son Aaron starting talking about something he’s learning called The Arrow Way. It’s part of the EngageNY curriculum. There’s a lot of positives in this representation, especially when it’s also coupled with number lines. But why couldn’t the problem above just skip the words “using the arrow way”? Or in problems […]

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Mechanical engineering might be the broadest engineering discipline....

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Let be a measure space. Let and . Prove that there exists a set with , such that . Solution: The solution strategy is to use simple functions (common tactic for measure theory questions). Let be a simple function such … Continue reading →

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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

Citation

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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
[…]

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

Citation

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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

Citation

mathhombre tweeted: @mathhombre

new modes of scholarship #edcomic https://t.co/rAoeBw6VTx left out tweeting your results #140atatime

2015-12-01 01:47:40

MrHonner tweeted: @MrHonner

2015-12-01 01:20:52

MrHonner tweeted: @MrHonner

RT @NYSMTP: MTs in all TEN regions engaged in geometric investigations with George Hart @MathforAmerica https://t.co/mtc6J7l9lL

2015-12-01 01:19:23

MathProjects tweeted: @MathProjects

RT @approx_normal: . @MathProjects your posters are going up in @klpetty2's room! https://t.co/KID7EOyIPW

2015-12-01 01:08:18

matthewmaddux tweeted: @MatthewMaddux

Coffee And Bacon: The Math Mistake That Makes Health Studies So Misleading - Faye Flam: The problem is not... https://t.co/ESbXlxdZy7

2015-12-01 00:22:04

matthewmaddux tweeted: @MatthewMaddux

Can You Tell Mathematics from Poetry? Take the Quiz to Find out https://t.co/MSlNc9tujT

2015-12-01 00:19:36

evelynjlamb tweeted: @evelynjlamb

Why it makes me happy, I'm not really sure. Perhaps I just like knowing that the human experience is manifold and absurd.

2015-12-01 00:13:47

evelynjlamb tweeted: @evelynjlamb

For when you have 4 1/2 hours that you don't want to enjoy. (I kid, I kid. It makes me happy that this exists.) https://t.co/deEolWW0Ei

2015-12-01 00:12:51

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