## Profile

Jan Achrenius

167 followers|52,259 views

AboutPostsPhotosYouTube

## Stream

### Jan Achrenius

Shared publicly -I've been watching you, a lalalala int32, a lalalala int64 LE int128, come on, a lalalala int32, a lalalala int64 LE int128, hey-a.

(inspired by +Jari Komppa)

(inspired by +Jari Komppa)

1

Add a comment...

### Jan Achrenius

Shared publicly -Pay what you want.

This week’s Humble Weekly Sale features Rochard from Recoil Games! Name your price and get Rochard and Rochard: Hard Times DRM-free and on Steam for Windows, Mac, and Linux, plus the Rochard digital art book and original soundtrack!

http://www.humblebundle.com/weekly

Check out the site for more details!

http://www.humblebundle.com/weekly

Check out the site for more details!

2

1

Add a comment...

### Jan Achrenius

Shared publicly -"Using historical production data, we calculate that global nuclear power has prevented an average of 1.84 million air pollution-related deaths and 64 gigatonnes of CO2-equivalent (GtCO2-eq) greenhouse gas (GHG) emissions that would have resulted from fossil fuel burning. On the basis of global projection data that take into account the effects of the Fukushima accident, we find that nuclear power could additionally prevent an average of 420 000–7.04 million deaths and 80–240 GtCO2-eq emissions due to fossil fuels by midcentury, depending on which fuel it replaces."

1

Add a comment...

In his circles

175 people

### Jan Achrenius

commented on a video on YouTube.Nice. And nice to see you're still going strong, Nick.

1

Add a comment...

### Jan Achrenius

Shared publicly -Finnish country. We have no cowboys, just coders.

1

And plenty of cowboy coders :D

Add a comment...

### Jan Achrenius

Shared publicly -Proof for Goldbach's weak conjecture

Busy day in analytic number theory; Harald Helfgott has complemented his previous paper http://arxiv.org/abs/1205.5252 (obtaining minor arc estimates for the odd Goldbach problem) with major arc estimates, thus finally obtaining an unconditional proof of the odd Goldbach conjecture that every odd number greater than five is the sum of three primes. (This improves upon a result of mine from last year http://terrytao.wordpress.com/2012/02/01/every-odd-integer-larger-than-1-is-the-sum-of-at-most-five-primes/ showing that such numbers are the sum of five or fewer primes, though at the cost of a significantly lengthier argument.) As with virtually all successful partial results on the Goldbach problem, the argument proceeds by the Hardy-Littlewood-Vinogradov circle method; the challenge is to make all the estimates completely effective and to optimise all parameters (which, among other things, requires a certain amount of computer-assisted computation).

1

1

Add a comment...

People

In his circles

175 people

Links

Basic Information

Gender

Male

Apps with Google+ Sign-in