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9:02 AM | GeoGebra with 3D View

As you may know we have been working on adding the 3D View to GeoGebra for a long time now. It’s been a much longer journey than we first imagined. In particular since 2008, the need has arisen to have … Continue reading →

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Professor Margot Gerritsen explains solving equations using matrices. Not a technical talk, but rather gives some examples of the problems that can be solved with matrices.

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12:05 PM | GECKOS

Growing Enriched Cultural Knowledge in Our Schools
The GECKOS website has been created to provide teachers with information, ideas, activities and resources to support them in the meaningful integration of Aboriginal perspectives in the school curriculum.
Follow navigation Secondary for Mathematics and Early Years for Numeracy.

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9:24 AM | Design a park

Design a site plan for a park and learn about fractions at the same time. Select sections on a grid as places for things such as picnic tables, swings, sandpits and ponds.
Explore several different ways of expressing fractions and displaying them, such as using a number line or colour on a grid.
The Alternate Link is available without Scootle access from ABC Splash.

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8:59 AM | Wishball challenge: hundredths

Challenge your understanding of decimal place value with numbers that include hundredths. Get a starting number, such as 46.87, and work towards turning it into a target number, such as 85.32. Spin a random digit, choose its decimal place value and use the given operation (either addition or subtraction) on your starting number. Don't overshoot the target!
You can use a 'Wishball' to help you reach the target number. Try to achieve the target with as few additions or subtractions as […]

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8:57 AM | Wishball challenge: tenths

How can you challenge your understanding of decimal place value with numbers that include tenths? Try this.
Receive a starting number, such as 128.9, and work towards turning it into a target number, such as 845.6. Spin a random digit, choose its decimal place value and use the given operation (either addition or subtraction) on your starting number. Be careful not to overshoot the target!
You can use a 'Wishball' to help you reach the target number. Try to achieve the target with as few […]

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8:54 AM | Wishball challenge: whole numbers

Challenge your understanding of decimal place value with 4-digit whole numbers.
Receive a starting number, such as 3786, and work towards turning it into a target number, 7664. Spin a random digit, choose its decimal place value and use the given operation (either addition or subtraction) on your starting number. Don't overshoot the target!
You can use a 'Wishball' to help you reach the target number. Try to achieve the target with as few additions or subtractions as possible.

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8:51 AM | Wishball: ultimate

Want to really test your understanding of decimal place value with whole numbers or numbers that include tenths, hundredths or thousandths?
Receive a starting number, such as 3569, 356.9, 35.69 or 3.569, and work towards turning it into a target number, such as 7832, 783.2, 78.32 or 7.832. Spin a random digit, choose its decimal place value and decide whether to add or subtract the random digit from your starting number.
You can use a 'Wishball' to help you reach the target number. Try to […]

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Sometimes it's helpful to use rounding to estimate a calculation, instead of working out the precise answer. Here's how to round to the nearest 10.
BBC, ' How do you round numbers to the nearest 10?', ABC Splash

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1:51 AM | The Mandelbrot Set

Famously beautiful, the Mandelbrot Set is all about complex numbers. Featuring Dr Holly Krieger from MIT.

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4:11 PM | CanvasLMS

...If this is your first time, come a few minutes earlier to check out the technology. The room opens half an hour before the event.
About Canvas
... sure helps.
Instructure
Instructure Inc. is... Wasatch mountains.
Event Hosts
... hallway testing.
Brian has spent the last three years managing development of the Canvas product. His experience in usability has been integral to understanding the needs of students and educators, and in developing a product that is both intuitive and […]

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9:43 AM | Zeno’s Paradox - Numberphile

How can an infinite process end?
An explanation helpful for geometric series and limiting sums

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newest proof

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9:04 PM | Switch up your research routine!

If you’ve ever worked out, you know that your body can get comfortable doing a particular exercise and then no longer feel challenged. In order for you to continue to transform your physique and train other muscles, you have to … Continue reading →

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8:31 PM | the exterior angle is greater than either of the non adjacent interior angles geometric proof

newest proof

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updated proposition

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newest proposition

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11:43 PM | Spin Dryer

How does a spin dryer work? Deane explains with a simple model made from buckets and a hand beater.
An example for circular motion.

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9:31 AM | Data Displayer

The Data Displayer provides interactive tools to investigate sets of data.
Explore data questions on sports (baseball home runs), movies (highest paid actors), agriculture or enter custom data.
Analysis and representation tools include mean, median & mode; box-and-whisker plot; scatterplot with line of best fit; standard deviation and mean.
Includes a Teacher's Guide.

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9:09 AM | PhysicsToGo

Designed for use on a tablet. This page includes a working accelerometer (on a tablet) and some interactives for investigating forces.

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4:43 AM | Incorrect Graph - Asthma Breakthrough

A picture graph from a news story that gets the ratio/number of pictures wrong.
The link takes you to an image file. Source, see Alternative Link.

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A pie graph from a news story that gets the size of the sectors wrong.
The link takes you to an image file. Source, see Alternative Link.

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4:24 AM | Catalog of Some Elementary Functions

This Demonstration presents a catalog of some elementary functions that can be used to illustrate how each of the parent functions can be transformed by varying different parameters.

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via @CERN http://t.co/9Rac42mBVh #CPviolation #CPsymmetry #matter #antimatter The CP violation is a violation of the CP-symmetry, a combination between the charge conjugation symmetry (C) and the parity symmetry (P). CP-symmetry states that the laws of physics should be the same if a particle is interchanged with its antiparticle, and then its spatial coordinates are inverted.The CP violation is discovered in 1964 by Christenson, Cronin, Fitch, and Turlay (Cronin and Fitch awarded the Nobel […]

Christenson, J., Cronin, J., Fitch, V. & Turlay, R. (1964). Evidence for the 2π Decay of the K_{2}^{0} Meson, Physical Review Letters, 13 (4) 138-140. DOI: 10.1103/PhysRevLett.13.138

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by @ulaulaman http://t.co/Q3AODpvKAs #Godel #ontologicalproof #god #computer The ontological arguments for the existence of God was introduced for the first time by St. Anselm in 1078: God, by definition, is that for which no greater can be conceived. God exists in the understanding. If God exists in the understanding, we could imagine Him to be greater by existing in reality. Therefore, God must exist.There are a lot of phylosophies, mathematics and logicians that proposed their ontological […]

Christoph Benzmüller & Bruno Woltzenlogel Paleo (2013). Formalization, Mechanization and Automation of Gödel's Proof of God's Existence, arXiv: 1308.4526v4

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\[(n+1)^3 - n^3 \equiv 1 \mod 6\] Claudi Alsina,, Roger Nelsen,, & Hasan Unal (2014). Proof Without Words: The Difference of Consecutive Integer Cubes Is Congruent to 1 Modulo 6 The College Mathematics Journal, 45 (2), 135-135 DOI: 10.4169/college.math.j.45.2.135 (facebook)

Claudi Alsina,, Roger Nelsen, & Hasan Unal (2014). Proof Without Words: The Difference of Consecutive Integer Cubes Is Congruent to 1 Modulo 6, The College Mathematics Journal, 45 (2) 135-135. DOI: 10.4169/college.math.j.45.2.135

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\[(n+1)^3 - n^3 \equiv 1 \mod 6\] Claudi Alsina,, Roger Nelsen,, & Hasan Unal (2014). Proof Without Words: The Difference of Consecutive Integer Cubes Is Congruent to 1 Modulo 6 The College Mathematics Journal, 45 (2), 135-135 DOI: 10.4169/college.math.j.45.2.135 (facebook)...
Claudi Alsina,, Roger Nelsen,, & Hasan Unal. (2014) Proof Without Words: The Difference of Consecutive Integer Cubes Is Congruent to 1 Modulo 6. The College Mathematics Journal, 45(2), 135-135.
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Claudi Alsina,, Roger Nelsen, & Hasan Unal (2014). Proof Without Words: The Difference of Consecutive Integer Cubes Is Congruent to 1 Modulo 6, The College Mathematics Journal, 45 (2) 135-135. DOI: 10.4169/college.math.j.45.2.135

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La settimana scorsa, su twitter, ho diffuso alcune immagini, foto scattate dalle pagine dal volume Letture da Le Scienze: Fisica delle particelle (un indice del volume), che raccoglieva alcuni articoli usciti sulla rivista italiana (e quindi anche su Scientific American). Poiché ognuna di quelle immagini fa inevitabilmente parte della storia della fisica, mi sembra sensato proporle raccolte insieme in un unico post molto più semplicemente raggiungibile di tanti piccoli... cinguettii.
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Weisskopf, V. (1968). The Three Spectroscopies, Scientific American, 218 (5) 15-29. DOI: 10.1038/scientificamerican0568-15

Barish, B. (1973). Experiments with Neutrino Beams, Scientific American, 229 (2) 30-38. DOI: 10.1038/scientificamerican0873-30

Treiman, S. (1959). The Weak Interactions, Scientific American, 200 (3) 72-84. DOI: 10.1038/scientificamerican0359-72

Cline D.B., Mann A.K. & Rubbia C. (1974). The Detection of Neutral Weak Currents, Scientific American, 231 (6) 108-119. DOI: 10.1038/scientificamerican1274-108

Glashow, S. (1975). Quarks with Color and Flavor, Scientific American, 233 (4) 38-50. DOI: 10.1038/scientificamerican1075-38

Nambu, Y. (1976). The Confinement of Quarks, Scientific American, 235 (5) 48-61. DOI: 10.1038/scientificamerican1176-48

Johnson, K. (1979). The Bag Model of Quark Confinement, Scientific American, 241 (1) 112-121. DOI: 10.1038/scientificamerican0779-112

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freakonometrics tweeted: @freakonometrics

"A World of Projection Distortions" http://t.co/BnXEGBO9DO http://t.co/IR96PnyScL

2014-07-30 21:05:58

freakonometrics tweeted: @freakonometrics

"Montréal, capitale de l’entrepreneuriat culturel" http://t.co/LdVzHkFrDU poke @pareto35

2014-07-30 20:57:35

MindAfterMath tweeted: @MindAfterMath

2014-07-30 20:53:57

republicofmath tweeted: @republicofmath

Distance of (1+sqrt(2))^n to nearest integer decays exponentially with n

2014-07-30 20:50:19

freakonometrics tweeted: @freakonometrics

"How the art world is reacting to big data" http://t.co/czIycxmHn9

2014-07-30 20:48:21

rmathematicus tweeted: @rmathematicus

RT @trueanomalies: The making of a #histsci myth: Kepler's Somnium and his mother's witchcraft trial: http://t.co/di6VOkUq17 by @rmathemati…

2014-07-30 20:44:04

rmathematicus tweeted: @rmathematicus

RT @AlexiBaker early modern color "chocolate" not brown but red like unprocessed beans: http://t.co/MP2xiUKNDp http://t.co/2HOxrCd68x

2014-07-30 20:42:18

peterrowlett tweeted: @peterrowlett

@christianp @TweetsofCushing did you see @evelynjlamb applied your ISR scoring system to Twitterbots? http://t.co/4wSQzwBGgh

2014-07-30 20:41:25

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