## The Art of Learning

Visualizing the Riemann zeta function and analytic continuation (slyt)
posted by kliuless on Dec 10, 2016 - 10 comments

## PAINTER STRIKES AGAIN

The Mad Painter was a sketch that first aired on Sesame Street in 1972. In the series, Our Protagonist (Paul Benedict, looking suspiciously like Greg Nog) decides he's going to paint a certain number, finds a surface on which to paint the numeral, paints said number, and then something funny happens. The Painter's co-stars included a young Stockard Channing, a bald mustachioed guy (Jerome Raphael), and a gorilla. Robert Dennis scores the pieces jauntily. Here they are, in numerical order: [ 2345678910*11 ]
posted by not_on_display on Jan 13, 2016 - 46 comments

## The likelihood that there's interesting or important math is pretty high

Shinichi Mochizuki and the impenetrable proof - "Fesenko has studied Mochizuki's work in detail over the past year, visited him at RIMS again in the autumn of 2014 and says that he has now verified the proof. (The other three mathematicians who say they have corroborated it have also spent considerable time working alongside Mochizuki in Japan.) The overarching theme of inter-universal geometry, as Fesenko describes it, is that one must look at whole numbers in a different light — leaving addition aside and seeing the multiplication structure as something malleable and deformable. Standard multiplication would then be just one particular case of a family of structures, just as a circle is a special case of an ellipse." (previously: 1,2; via)
posted by kliuless on Oct 16, 2015 - 33 comments

## like I'm the only person who ever mixed a margarita in a sailor's mouth!

How Many Men Did The Golden Girls Sleep With, Exactly?
Refinery 29 claims to have tallied up the numbers. (A quick summary courtesy of Jezebel.)
posted by flex on Sep 1, 2015 - 54 comments

## Time with class! Let's Count!

I want to demonstrate how amazing combinatorial explosion is! Please don't stop me.  An animation about numbers that get large. It has a happy ending and possibly even a moral.
posted by Wolfdog on Jun 12, 2015 - 21 comments

## HoTT Coq

Univalent Foundations Redefines Mathematics - "When a legendary mathematician found a mistake in his own work, he embarked on a computer-aided quest to eliminate human error. To succeed, he has to rewrite the century-old rules underlying all of mathematics." (previously)
posted by kliuless on Jun 9, 2015 - 13 comments

## 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)
posted by kliuless on Jun 6, 2015 - 28 comments

## Eeny, meeny, miny, mo: Counting ditties long ago

Eena, meena, mina, mo, / Cracka, feena, fina, fo, / Uppa, nootcha, poppa, tootcha, / Ring, ding, dang, doe. "Losing Count: “Eeny, meeny, miny, mo” and the ambiguous history of counting-out rhymes," from The Paris Review.
posted by MonkeyToes on Apr 22, 2015 - 30 comments

## Bibbity-bee Bitey Bibbity-bee

posted by Stark on Apr 22, 2015 - 42 comments

## Still Combining Numbers On A Grid To Get Bigger Numbers, But Different

Get 10 is a new browser game from veewo, creators of 1024.
posted by Rinku on Dec 9, 2014 - 31 comments

## The Phone Number 321-Liftoff Is Not For Sale

​​How I Got My Own Area Code: It took the combination of phone phreak and "space cadet" to find a relationship between the number 321 and the countdowns of Cape Canaveral.
posted by danabanana on Nov 19, 2014 - 18 comments

## Carrier Access Codes and cultural detritus, featuring Alf and friends

Carrier Access Codes are a largely dated*, though still functional service to select your long-distance telephone carrier per phone call. In the United States, these "dial-around codes" reached a (commercial) peak in the late 1990s, as seen with ads featuring such semi-notables as Marla Gibbs, Christine Taylor and Reginald VelJohnson, Harry Anderson, John Lithgow, Tony Danza, Doug Flutie, and even Alf and some well-known friends.
posted by filthy light thief on Mar 29, 2014 - 73 comments

## Oh seven nine oh four seven nine

Grime numbers station, by Autodespair.
posted by avocet on Mar 8, 2014 - 11 comments

## @ Risk

"I had a rare Twitter username, @N. Yep, just one letter. I’ve been offered as much as \$50,000 for it. People have tried to steal it. Password reset instructions are a regular sight in my email inbox. As of today, I no longer control @N. I was extorted into giving it up."
—Naoki Heroshima explains how his accounts were hacked in order to force him to give up his single-letter Twitter handle.
posted by me3dia on Jan 30, 2014 - 86 comments

## Dynetzzle

A standard 6 sided die is a cube. It has eleven nets. The sum of the numbers on opposite faces of a die is 7.
posted by Elementary Penguin on Jan 30, 2014 - 26 comments

## binding the andat

Closing in on the twin prime conjecture (Quanta) - "Just months after Zhang announced his result, Maynard has presented an independent proof that pushes the gap down to 600. A new Polymath project is in the planning stages, to try to combine the collaboration's techniques with Maynard's approach to push this bound even lower."
posted by kliuless on Dec 1, 2013 - 16 comments

## "There's actually no such thing as an uninteresting natural number"

io9 takes a look at why the number 1729 shows up in so many Futurama episodes. It's mathtastic!
posted by quin on Oct 16, 2013 - 36 comments

## Cat images reportedly unaffected

Xerox scanners/photocopiers randomly alter numbers in scanned documents
posted by Jpfed on Aug 5, 2013 - 112 comments

## Visualizing Numbers with WebGl

How To Fold a Julia Fractal. A beautiful interactive introduction to complex numbers, fractals and waves. (Requires WebGL). To Infinity And Beyond is a similar introduction to calculus.
posted by empath on Jul 11, 2013 - 33 comments

## What's cooler than [1965 avg. CEO pay]? The [box office sales of Jaws].

Tumblr's \$1.1 Billion price-tag instinctively seems very high to most of us, but without context, numbers this huge are often literally unfathomable to the masses. To help readers gain perspective on the huge numbers commonly tossed around by the media, researcher Glen Chiacchieri has created Dictionary of Numbers, a Google Chrome extension that automatically adds context to huge numbers printed in the web pages that you read.
posted by schmod on May 20, 2013 - 51 comments

## Proof and Community Standards

In August of last year, mathematician Shinichi Mochizuki reported that he had solved one of the great puzzles of number theory: the ABC conjecture (previously on Metafilter). Almost a year later, no one else knows whether he has succeeded. No one can understand his proof.
posted by painquale on May 10, 2013 - 59 comments

## Computerized Math, Formal Proofs and Alternative Logic

Using computer systems for doing mathematical proofs - "With the proliferation of computer-assisted proofs that are all but impossible to check by hand, Hales thinks computers must become the judge."
posted by kliuless on Mar 16, 2013 - 25 comments

## What-If Numbers

XKCD/What If's Randall Munroe brings meaning to numbers. As a by-product. Of his day-to-day research. For your day-to-day entertainment.
posted by aniola on Feb 6, 2013 - 22 comments

## the power and beauty of mathematics

An eternity of infinities (via)
posted by kliuless on Feb 2, 2013 - 23 comments

## Numberphile: videos about numbers and stuff

Numberphile is a website containing short videos (approx. 5-10 min.) about numbers and stuff. Mathematicians and physicists play around with the tools of their trade and explain things in simple, clear language. Learn things you didn't know you were interested in! Find out why 493-7775 is a pretty cool phone number! What's the significance of 42, anyway? What the heck is a vampire number? Why does Pac-Man have only 255 screens? Suitable for viewing by everyone from intelligent and curious middle-schoolers to math-impaired adults. Browse their YouTube channel here. (Via)
posted by BitterOldPunk on Dec 29, 2012 - 20 comments

## Wonky graphs of 2012

2012: The year in graphs - as picked by the Washington Post Wonkblog's favorite economists, political scientist, politicians and other wonkys.
posted by Artw on Dec 28, 2012 - 17 comments

## Now maybe the number of hot dogs can match the number of buns?

In Recognition of 12/12/12, Let Us Consider the Concept of Dozenalism.
posted by oneswellfoop on Dec 12, 2012 - 38 comments

## SPAUN of the living

The simulated brain - "First computer model to produce complex behaviour performs almost as well as humans at simple number tasks." [1,2,3,4,5,etc.]
posted by kliuless on Dec 8, 2012 - 22 comments

## Flash Anzan

The world record for Flash Anzan was broken this year at the 2012 All Japan Soroban [abacus] Championship. Competitors in Flash Anzan sum up 15 3-digit numbers that are displayed in turn within a set time. The record is now 1.70 seconds, which means that each number is displayed for just over 0.1s. Here is a video of a "slow" 1.85 seconds seconds where the numbers are barely readable.
posted by milkb0at on Nov 2, 2012 - 31 comments

## Factor Conga

Animation of prime factorization of the integers based on Brent Yorgey's factorization diagrams, described here. [via Data Pointed, previously.]
posted by albrecht on Nov 1, 2012 - 35 comments

## It's numbers all the way down...OR IS IT

Benjamin Grosser's latest project is Facebook Demetricator, a browser application that aims to confront our "collective obsession with metrics" by hiding all of the numbers embedded in Facebook's interface— friends, likes, shares, comments, and even timestamps.
posted by brieche on Oct 27, 2012 - 6 comments

## What is the smallest prime?

What is the smallest prime? "It seems that the number two should be the obvious answer, and today it is, but it was not always so. There were times when and mathematicians for whom the numbers one and three were acceptable answers. To find the first prime, we must also know what the first positive integer is. Surprisingly, with the definitions used at various times throughout history, one was often not the first positive integer (some started with two, and a few with three). In this article, we survey the history of the primality of one, from the ancient Greeks to modern times. We will discuss some of the reasons definitions changed, and provide several examples. We will also discuss the last significant mathematicians to list the number one as prime."
posted by escabeche on Sep 18, 2012 - 61 comments

## Counting Rhos

Do you like biology? Do you like numbers? Like, actual numbers and not the television show? Take a look at BioNumbers.
posted by Blazecock Pileon on Sep 17, 2012 - 10 comments

## "Our names were made for us in another century."

Towns with number names: Six, Eight, Twenty, Fifty-six, Seventy-six, Eighty-four, Eighty-eight, Ninety-six, Hundred and 1770. Honorable mention for Wonowon.
posted by jessamyn on Aug 25, 2012 - 41 comments

## Big (and small) Numbers

FatFonts creates numerical fonts where the amount of ink/pixels for each number is in direct proportion to its value.
posted by fearfulsymmetry on May 14, 2012 - 23 comments

## Number A Day

NumberADay - Every working day, we post a number and offer a selection of that number’s properties.
posted by Wolfdog on Jan 11, 2012 - 30 comments

## 47

47 is a magical number. It has appeared more than a few times on Star Trek, Alias, and in many films.
The 47 society is dedicated to exploring the phenomenon that is 47.
posted by finite on Sep 29, 2011 - 84 comments

## Finite formula found for partition numbers

New math theories reveal the nature of numbers [1,2] - "We prove that partition numbers are 'fractal' for every prime. These numbers, in a way we make precise, are self-similar in a shocking way. Our 'zooming' procedure resolves several open conjectures, and it will change how mathematicians study partitions." (/.|via)
posted by kliuless on Jan 22, 2011 - 45 comments

## the idea of a fully operational zero...

"Michel de Montaigne, whose essays transformed Western consciousness and literature, was not capable of solving basic arithmetic problems. And most other people would not be able to do so either, if not for the invention of decimal notation by an unknown mathematician in India 1500 years ago." The Greatest Mathematical Discovery? (expanded pdf) a paper written for the US Dept. of Energy makes this assertion based in part on the work of Georges Ifrah. [via]
posted by jessamyn on Aug 26, 2010 - 44 comments

## Tile-based maths puzzle

FFF - Navigate the numbers in Blockade. Can you clear the entire board?
posted by greatgefilte on Jun 25, 2010 - 13 comments

## John Baez's Favorite Numbers

My Favorite Numbers by John Baez
posted by vostok on Apr 22, 2010 - 24 comments

## Prime numbers are just the beginning.

Every number from 1 to 9,999 has a special meaning. (much mathematical terminology, scrolling)
posted by zardoz on Apr 21, 2010 - 69 comments

## stimulusing

Veronique de Rugy, NRO contributor and George Mason fellow, says her research indicates that stimulus funding was disproportionately directed towards Democratic congressional districts. Nate Silver begs to disagree. De Rugy responds here; Silver responds here. Others say that this is a model "for the quick, effective peer-review that the internet facilitates." Perhaps this is a new model for peer review?
posted by lalex on Apr 3, 2010 - 27 comments

## Very large numbers

The Shannon number? Skewes' number? Graham's number? Please. When you're ready to get serious, here are some truly large numbers. (previously, but with dead links)
posted by Joe Beese on Mar 9, 2010 - 45 comments

## Number gossip

All this number gossip. 41 is deficient, while 43, its twin, is lucky. But 43 is also evil. 44 is happy. 144 is hungry. 126 is a vampire. 7912 is weird.
posted by twoleftfeet on Mar 8, 2010 - 34 comments

## It's dressed to the nines!

Late Thursday Flash Fun: Dropsum V2 is like a mix of sudoku and tetris and some other kind of block game. Much mindless fun to be had...
posted by schyler523 on Jul 30, 2009 - 11 comments

## 3D Mapping

Durango Bill's Home Page. With topics that include: 3D end-to-end tour of the Grand Canyon, the origin and formation of the Colorado River, and examples of river systems that cut through mountain ranges instead of taking easier routes around them in Ancestral Rivers of the World.
posted by netbros on Jul 22, 2009 - 5 comments

## Beware of Oddity

Happy Odd Day!
posted by Potomac Avenue on May 7, 2009 - 42 comments

## The H&FJ Institute for Unapplied Mathematics

Joe Palca, a science correspondent for NPR's Morning Edition, was meditating on the best way to convey the magnitude of the world's largest known prime number, 243112609-1. He contacted H&FJ at Typography.com to discuss the implications of typesetting a number with more than twelve million digits. Crunching of numbers and fonts ensued.
posted by netbros on Apr 22, 2009 - 21 comments

## Genuine random numbers, generated by radioactive decay

HotBits is an Internet resource that brings genuine random numbers, generated by a process fundamentally governed by the inherent uncertainty in the quantum mechanical laws of nature, directly to your computer in a variety of forms. HotBits are generated by timing successive pairs of radioactive decays detected by a Geiger-Müller tube interfaced to a computer. (Warning: random sounds.)
posted by parudox on Feb 9, 2009 - 41 comments

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