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37 posts tagged with Pi.

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## 3Blue1Brown: Reminding the world that math makes sense

Understanding e to the pi i - "An intuitive explanation as to why e to the pi i equals -1 without a hint of calculus. This is not your usual Taylor series nonsense." (via via; reddit; previously) [more inside]

## I got cosines / on a cloudy day

The goofy, lofi math music of Al G. Bra and friends: Pi Girl — Say That Funky Number, Math Guy — Mathonna's Mathematical Girl. Plus: a trailer for math thriller Live and Let Pi, featuring the title track by Paul DesCartney.

## Celebrate Vi day.

## Death Attends The Matinee

## Why taunt me? Why upbraid me? I am merely a genius, not a god.

In the pantheon of fictional detectives, Rex Stout's Nero Wolfe is among the best. If you haven't met the fat, cranky, sedentary, orchid-loving gourmand of a detective, and his street-smart, wise-cracking, witty right-hand of an assistant, Archie Goodwin, this introduction to the pair may be of use. Between 1935 to 1974, Wolfe and Goodwin solved mysteries, captured criminals of all ilks, and on one notable occasion, got the upper hand on J. Edgar Hoover. The books are very much of their time. [more inside]

## Who stole my pi.

Man trademarks pi sign π. Hires attorney, submits takedown request letter to online DIY merchandiser Zazzle. In knee-jerk response, this past week Zazzle removed

*all*merchandise bearing π sign. [more inside]## Using pies to calculate pi

Ahead of Pi Day (March 14), Matt Parker tries to accurately calculate pi using pies. [SLYT] An extended version of the video will be uploaded on Pi Day, but here's your chance to go out and buy pies before that.
(Video runs 3 minutes, 14 seconds.)

## How to determine if a record breaking calculation of pi is accurate

**Q**: "I was trying various methods to implement a program that gives the digits of pi sequentially. So, while writing the program I got stuck on a problem, as with all algorithms: How do I know that the n digits that I've calculated are accurate?" [more inside]

## Pi in the Sky SF

In honor of the ZERO1 Biennial ISHKY has the first thousand digits of Pi written in the sky over San Francisco

## The Art of π, φ and e

## Woman's Intuition Aids Her

**LADIES**

When in need of legal

or confidential advice

why not confer with

one of your own sex?

A concise history of Miss Cora M. Strayer's Private Detective Agency.

## When I was a little kid, my mother told me not to stare into the sun, so when I was six I did.

Jason Padgett is the first person to acquire synasthesia and savantism by head trauma. Three years after his mugging, he began drawing complex geometries, including hand-drawn approximations of fractals, the first time anyone had ever done so. Eventually a mathematician suggested Padgett take a math course; with trigonometric notation Padgett offered a proof of his approximation of Pi. [more inside]

## Transcendental Music

Happy Tau Day! τ (2 × π, that is, 6.28...) is the number of radians in a turn. Translating the digits to notes even makes beautiful music. (By comparison, what pi sounds like). Previously.

## pi-winning

## True art is irrational.

This is what pi sounds like. At least, that's one person's interpretation. There are certainly plenty of others, including touchtone pi, hammered dulcimer pi, violin pi, smooth techno pi, crazy awesome pi, vaguely unsettling pi (sounds best with headphones), and lots of piano pi. Pi has even done a duet with its buddy

(pi as music previously on metafilter)

*e*. Nothing here that tickles your fancy? Think you could do better? Why not make your own pi song? Hell, make two! If you're having trouble remembering all those pesky digits, don't worry: there's a song for that, too.(pi as music previously on metafilter)

## How do you calculate Pi? Build a supercomputer.

How do you calculate Pi? Build a supercomputer.

*The Mountains of Pi*, a New Yorker profile of the mathematician (sic) the Chudnovsky brothers. Warning: the article is from 1992, and internet is missing its definite article. (Previously)## It's twice as good as Pi!

## A constant reminder

"This day may be celebrated in a variety of ways. Pause and give thought to the role that the number pi has played in your life. Imagine a world without pi. Attempt to memorise pi to as many decimal places as you can. If you're feeling creative, devise alternative values for pi. Go to a party (I will). Or just celebrate in the time-honoured fashion of ignoring Pi Approximation Day altogether."

Happy Pi Approximation Day. [more inside]

Happy Pi Approximation Day. [more inside]

## Pi in the sky

New physics research: Time variation of a fundamental dimensionless constant

## From Frisbie Pi to Pluto Platter

In 1897, the Indiana House of Representatives passed a bill mandating that the ratio of the circumference to the diameter of a circle (pi) was 3.2. Now, 112 years later, their neighbors in the Illinois Senate have passed a resolution redefining Pluto as a planet, at least when it passes through the Illinois night sky. Of course, Pluto may not even travel through the Illinois night sky for some time.

## Pi(es) in a field

## I'm watching you reading this post *right now*.

## 3.14159265itwasthebestoftimesitwastheworstofti...

Ever wondered if and where a specific set of numbers could be found in pi? Maybe you'd like to know where your birthday is? Or maybe just something funny. [prev. here, here] [more inside]

## Squaring the square

Nowhere-neat tilings are actually pretty neat. We all know you can't "square the circle", but do you know the story of squaring the square? (And by the way, even if you can't construct π with a ruler and compass, you can come awfully close without too much work.)

## by the numbers

Pi to 1,000 places on piano is just one of the many catchy tunes on math sonifications. And check out more interesting things on on artist Tom Dukich's site.

## Here's a slice of π

Celebrate π. Sing about π. Wear π. Learn the digits of π. Watch the wonder of π. Be vexed by the implications of π. Get slightly embarrassed for π. Give all your love to π.

**Happy Pi Day. Nerds rule!**## Cornish Bush π

That Kate Bush song where she sings 150 digits of π and gets it wrong [possibly]? Turns out it contains secret references to, among other things, some stones in Cornwall that look sort of like a steam locomotive and a number of megalithic sites. No, seriously. He's got proof.

## Happy Pi Day

In case it has escaped your attention, tomorrow is 14 March which, in American notation, is written 3/14. If you have a certain type of mind you will immediately notice that these digits bear a close approximation to one of the most important numbers in mathematics - pi.

## This so called reality

If the universe is a hologram and the healthy human brain a valve of consciousness then where'd this mental infinity come from? Are we simply living the simulacrum? Or does Pi protect us all, forever, infinitely?

## Yeah, I know this pi shit backwards and fo'wards.

3.141592653589793238462643383279 [Quicktime; some mild language and wizard-related violence]

## 3.1415926535897932384626433...

Very few people will ever need to learn the value of pi beyond a handful of digits, but some people are more obsessed than others. They call themselves Piphilologists, and all the pi-memorization writings you could ever possibly want have been compiled into one massive Piphilogical text file. And today, Piphilologists the world over must surely bow in tribute to Akira Haraguchi, who has just recited pi from memory to 83,431 places.

## Crafty geeks

Whether its crocheted hyperbolic models or Lorenz manifolds, a lace pi shawl or knit Fibonacci socks, some math geeks find expression in the fiber arts.

## pi10k.

## Happy Pi Day!

Happy Pi Day! At 1:59 PST, the San Francisco Exploratorium kicks off its Pi Day festivities. If you can't make it, here are more activities or you can just sing a song to ?.

ð = "moderately pinocle mollify backup ammonium freshen chromium famine."

Or 3.141592653589793238462643383279...whichever is easier for you to remember.

Mnemesis tries to make it easier for you to memorize numbers by having you memorize words instead.

Or 3.141592653589793238462643383279...whichever is easier for you to remember.

Mnemesis tries to make it easier for you to memorize numbers by having you memorize words instead.

## Is your date of birth in pi?

Is your date of birth in pi? Of course it is, eventually. But are you one of the lucky 63% whose special day falls within the first 100,000,000 digits? How about your Social Security Number? That club is even more exclusive. A good tool for the pi-curious.

You've helped crack mathematical games, you've searched for aliens, the cure for cancer, cure for AIDS and even tried to calculate pi. What's left to do in distributed computing? How about helping the fight against anthrax? Remember, if you don't download the screensaver, the terrorists have won.

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