X

Sidebar

Filters

+

Who is in the world's wealthiest elite, and where do they live? Which are the world's best and worst board-games? Oliver Roeder, a senior writer for FiveThirtyEight, says a statistical analysis can tell us. This programme was first broadcast on the BBC World Service.

+

The exciting news today (besides tonight’s blizzard!) is the Greek elections. Yesterday an anti-austeristy party called Syriza won the plurality of the votes, and is on the very verge of winning a majority as well. This is huge because the leader of the party, Alexis Tsipras, has basically promised the Greek people that, if elected, he […]

+

Seth Stephens-Davidowitz continues with his Google search data-related op-eds for the New York Times. This time he looks at the insecurities in sex, based on the search volume of various…Tags: Google, New York Times, sex

+

Halley’s famous comet last appeared in 1986 and isn’t due to return until around 2061. Dr. Halley, I received from you formerly a table of the motions of the comet of 1680 in an elliptic orb. You there put The … Continue reading →

+

A student asks: How do I simplify horrible product and quotient rule expressions? The example they gave was differentiating: $f(x) = (2x – 3)^4 (x^2 + x + 1)^5$ First up, a careful bit of product rule: $u = (2x – 3)^4$, so $\diff{u}{x} = 8(2x- 3)^3$ $v = (x^2 + x + 1)^5$, so $\diff{v}{x} = 5(2x+1)(x^2 + x + 1)^4$ … and we want $u \diff{v}{x} + v \diff{u}{x}$. Well now. I know students who would methodically multiply out the brackets using the binomial expansion, end up with an
[…]

JohnDCook tweeted: @JohnDCook

.@revodavid Schrödinger's iPod!

2015-01-26 20:12:05

JohnDCook tweeted: @JohnDCook

iTunes is alternately telling me my computer is and is not authorized.

2015-01-26 20:06:52

rmathematicus tweeted: @rmathematicus

“@SlateVault: Ad for IBM Electronic Calculator, February 1952 http://t.co/lQ3OyfcKoe via @QuestionableAdv http://t.co/pib5yke9d6”

2015-01-26 20:05:28

rmathematicus tweeted: @rmathematicus

RT @embryoproject: Remembering Vavilov #OnThisDay, plant geneticist who experimented w/ plant breeding http://t.co/uLJ03xPStY #history http…

2015-01-26 20:05:01

rmathematicus tweeted: @rmathematicus

“@GeneDannen Leo Szilard, the physicist who conceived the nuclear chain reaction, kept a small photo of a lost love.
http://t.co/VZ0hFOqVtF”

2015-01-26 20:03:36

ulaulaman tweeted: @ulaulaman

2015-01-26 20:03:19

mathhombre tweeted: @mathhombre

RT @woutgeo: @MathMinds @mathhombre @dcox21 @Trianglemancsd @Math_m_Addicts @bkdidact @delta_dc Thx everyone! This is perfect. http://t.co/…

2015-01-26 20:02:09

DrMathochist tweeted: @DrMathochist

@evelynjlamb @Samuel_Hansen and that's the thing: very few people start careers like that anymore.

2015-01-26 20:01:42

X