## Posts Tagged ‘**Goldbach’s Conjecture**’

## “There are 10 kinds of people in the world: those who understand binary numerals, and those who don’t”*…

From a collection of vintage photos of computing equipment by “design and tech obsessive” James Ball…

More at Docubyte…

[TotH to Kottke]

* vernacular joke, as invoked by Ian Stewart in *Professor Stewart’s Cabinet of Mathematical Curiosities*

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**As we rewind,** we might spare a thought for Christian Goldbach; he died on this date in 1764. A mathematician, lawyer, and historian who studied infinite sums, the theory of curves and the theory of equations, he is best remembered for his correspondence with Leibniz, Euler, and Bernoulli, especially his 1742 letter to Euler containing what is now known as “Goldbach’s conjecture.”

In that letter he outlined his famous proposition:

Every even natural number greater than 2 is equal to the sum of two prime numbers.

It has been checked by computer for vast numbers– up to at least 4 x 1014– but remains unproved.

(Goldbach made another conjecture that every odd number is the sum of three primes; it has been checked by computer for vast numbers, but also remains unproved.)

Goldbach’s letter to Euler* (source, and larger view)*

*(Roughly) Daily* is headed into a Thanksgiving hiatus; regular service will resume when the tryptophan haze clears… probably around Monday, November 26. Thanks for reading– and have Happy Holidays!

## “The world… gives back to every man the reflection of his own face”*…

In Chichibu, Japan, two hours northwest of Tokyo, there’s an odd museum; perhaps the only one of its kind. It’s called the Chinsekikan (which means hall of curious rocks) and it houses over 1700 rocks that resemble human faces.

The museum houses all kinds of

jinmenseki, or rock with a human face, including celebrity lookalikes like Elvis Presley [below]. And according to a 2013 post on Kotaku, there are also movie and video game character rocks like E.T., Donkey Kong and Nemo…

Learn the back story and take the tour at “The Japanese Museum of Rocks That Look Like Faces.”

* William Makepeace Thackeray

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**As we practice being stone-faced,** we might spare a thought for Christian Goldbach; he died on this date in 1764. A mathematician, lawyer, and historian who studied infinite sums, the theory of curves and the theory of equations, he is best remembered for his correspondence with Leibniz, Euler, and Bernoulli, especially his 1742 letter to Euler containing what is now known as “Goldbach’s conjecture.”

In that letter he outlined his famous proposition:

Every even natural number greater than 2 is equal to the sum of two prime numbers.

It has been checked by computer for vast numbers– up to at least 4 x 1014– but remains unproved.

(Goldbach made another conjecture that every odd number is the sum of three primes; it has been checked by computer for vast numbers, but also remains unproved.)

Goldbach’s letter to Euler* (source, and larger view)*

## I was expecting… well, a deep, booming voice…

Readers will recall **the effort at CERN’s Large Hadron Collider to discover the Higg’s Boson**— “The God Particle.” ** The Telegraph reports** that while the search for the sub-atomic fugitive continues, scientists have determined that, when it is created at the Swiss supercollider–

**— ” it will sound like several coins clattering around the bowl of a wine glass.”**

*if*it is createdScientists used information from computer models to calculate what the creation of the particle will sound like, a process called “sonification”.

LHC Sound, a group of scientists, musicians and artists in London, has used data on the particles and matched it to qualities such as pitch and volume to determine how the collision will sound.

Dr Lily Asquith, who models data for the LHC and has contributed to the sound project, wrote on her blog: “Sound seems the perfect tool with which to represent the complexity of the data.

“Our ears are superb at locating the source and location of sounds relative to one another … We also have an incredible ability to notice slight changes in pitch or tempo over time and to recognise patterns in sound after hearing them just once.”

Read the full report **here**.

**As we reinterpret the soundtracks of our lives,** we might recall that it was on this date in 1742, in a letter to **Leonhard Euler**, that **Christian Goldbach** outlined his famous proposition, now know as “Goldbach’s Conjecture”:

Every even natural number greater than 2 is equal to the sum of two prime numbers.

It has been checked by computer for vast numbers– up to at least 4 x 1014– but remains unproved.

Goldbach’s letter to Euler* (source, and larger view)*

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