Slashdot Mirror


E8 Structure Decoded

arobic writes "A group of mathematicians from US and Europe succeeded in mapping the E8 structure, an example of a Lie group. These were developed by the well-known mathematician Sophus Lie (pronounce Lee) in the last century and are used for many applications, mainly in theoretical physics. This is an important breakthrough as it could help physicists working on Grand Unified Theories (aka GUTs)."

19 of 127 comments (clear)

  1. iPod by slashdottinitup · · Score: 3, Funny
    FTFA:

    The magnitude and nature of the E8 calculation invite comparison with the Human Genome Project. The human genome, which contains all the genetic information of a cell, is less than a gigabyte in size. The result of the E8 calculation, which contains all the information about E8 and its representations, is 60 gigabytes. This is enough to store 45 days of continuous music in MP3-format.
    Hear that? That's the sound of Apple's iPod marketing finally reaching absolute ubiquity.

    -The Wolf
    1. Re:iPod by Short+Circuit · · Score: 2, Funny

      It's better than LoCs and telephone books. I just wish they'd mentioned the encoding bitrate...

    2. Re:iPod by Wooster_UK · · Score: 2, Funny

      So how many War and Peaces are in an hour of continuous mp3?

      And more to the point, how many War and Peaces are there in a New Jersey?

  2. Pronounce... by spazmolytic666 · · Score: 4, Funny

    Pronounce it "Lee-eh"; At least that is how I would do it as a Scandinavian.

    It's PRINCESS "Lee-eh" you insensitive clod!

    --
    Help! I've fallen in a karma hole and I can't get up!
  3. Re: Pronounce it "Lee-eh" by Anonymous Coward · · Score: 4, Funny

    Pronounce it "Lee-eh"; At least that is how I would do it as a Canadian.
  4. Amusing quote from article by CrazyJim1 · · Score: 3, Funny

    "The result of the E8 calculation, which contains all the information about E8 and its representations, is 60 gigabytes. This is enough to store 45 days of continuous music in MP3-format."

    Because we know physicsts and mathematicians that would be interested in this problem would have no idea how a computer works and have to translate it into teenager speak.

  5. Vogan mathematics... by Anonymous Coward · · Score: 5, Funny

    is, of course the third worst in the universe.

  6. I'm no mathemtician but... by east+coast · · Score: 4, Funny

    So now we're going to have truth and lie tables?

    Stop this crazy planet. I want to get off!

    --
    Dedicated Cthulhu Cultist since 4523 BC.
    1. Re:I'm no mathemtician but... by MarkGriz · · Score: 2, Funny

      "So now we're going to have truth and lie tables?"

      What do you mean "now"?
      These have been around since the days of the first engineers and politicians.

      --
      Beauty is in the eye of the beerholder.
  7. Units? by Hemogoblin · · Score: 2, Funny

    If written out on paper, the calculation describing this structure, known as E8, would cover an area the size of Manhattan. I'm having trouble understanding this. Could someone please restate in LOCs (Library of Congresses)?
  8. Re:Representation Theory by LiquidCoooled · · Score: 2, Funny

    CAT: [to RIMMER] What IS it?
    RIMMER: It's a rent in the space-time continuum.
    CAT: [to LISTER] What IS it?
    LISTER: The stasis room freezes time, you know, makes time stand still. So whenever you have a leak, it must preserve whatever it's leaked into, and it's leaked into this room.
    CAT: [to RIMMER] What IS it?
    RIMMER: It's a singularity, a point in the universe where the normal laws of space and time don't apply.
    CAT: [to LISTER] What IS it?
    LISTER: It's a hole back into the past.
    CAT: Oh, a magic door! Well, why didn't you say?

    --
    liqbase :: faster than paper
  9. my GUT instinct tells me.. by laggist · · Score: 2, Funny

    the answer is 42!

  10. Re:Representation Theory by pushing-robot · · Score: 3, Funny

    The fact that a (finite) computer calculation can help determining an infinite list of representation is very nice.

    Sadly, Mr. Vogan was later lynched by a rampaging mob of respectable physicists who had finally realized that the one thing they really couldn't stand was a smartass.

    --
    How can I believe you when you tell me what I don't want to hear?
  11. Re:Not a Lie Group. by haakondahl · · Score: 4, Funny
    From TFA: Mathematicians study symmetries in higher dimensions. E_8 has 248 dimensions. "What's attractive about studying E_8 is that it's as complicated as symmetry can get. Mathematics can almost always offer another example that's harder than the one you're looking at now, but for Lie groups E_8 is the hardest one," Vogan said.

    Mine goes to E_11.

    --
    Don't trust anyone under thirty.
  12. Re:Representation Theory by Anonymous Coward · · Score: 1, Funny

    You know, only the Vogon's would be attracted to something that produces that much paperwork.
    Boy am I glad that you put that apostrophe in to let me know an s was coming. There is nothing worse than being startled by a surprise plural!
  13. Re:Pronounce it "Lee-eh" by Cheapy · · Score: 2, Funny

    Lee-eh! L-E-E--E-H! L-E-E--E-H!

    Poor mathematician. He must've been killed by Snu-Snu. Or maybe lucky mathematician...

    --
    Would you kindly mod me +1 insightful?
  14. It seems lame to us.. by Peter+Trepan · · Score: 2, Funny

    Typical geek attitude. If it's not Vorbis, it's LAME.

    --

    Step into a huge movement. Don't Tread In Me.

  15. Re:Not a Lie Group. by Alsee · · Score: 5, Funny

    E8 is not a Lie Group. E8 is the biggest Lie Group.

    It seems somebody flunked basic set theory. :D

    -

    --
    - - You can't take something off the Internet! That's like trying to take pee out of a swimming pool.
  16. Re:Not a Lie Group. by pfafrich · · Score: 2, Funny

    As other had said it is not the biggest Lie group, there are two families Ak and Dk of lie groups which are infinite sequences. You can think of Ak as the symmetry of the trianagle, tetrahedron, 4-simplex, ..... there one of these for each dimension. Likewise Dk is related to the symetry of the square, cube, hyper-cube and n-dimensional cube. To these are added the so called exceptional groups, sort of like the icoshedron and its four dimensional analogue. It just so happens that these do not for an infinite sequence, higher dimensional spaces kind of get simpeler after a while which don't allow for E_11 to exist.

    --
    There are four sorts of people in the world: fools, lunatics, idiots and morons. - Umberto Eco, Foucaut's pendulum.