Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Found a math equation graffitied on a wall. What's it trying to say?

  1. Nov 24, 2012 #1
    Hello everyone, longtime reader, first time poster.

    A friend and I discovered this piece of math graffitied on an obscure laneway wall in Melbourne. I find it a bit mindblowing that someone would go to all this effort, particularly in a place where very few people are going to see it. As you can see from the video, it is quite neat and meticulously done.

    I understand parts of it, there are some parts I don't understand, but really I have two major questions I was hoping you guys could help me out with.

    1. What is it trying to say overall. What is all this math 'for'?

    2. (Bonus marks) What drove this person to do this?



    Thanks for your time.
     
    Last edited by a moderator: Sep 25, 2014
  2. jcsd
  3. Nov 24, 2012 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Looks a bit like thermodynamics, but I don't recognize the equations.

    ##\frac{d[\ln(n)]}{dn}=\frac{1}{n}##

    ##d[\ln(P)]=-\sum_j [\ln(n_j)+1] dn_j## => ##\sum_j dn_j = 0## and ##\sum_j u_j dn = 0##
    => ##d[\ln(P)]=\sum [-\ln(n_j)+a-1+bu_j]dn_j=0##
    => ##-\ln(n_j)+a-1+bu_j=0## or ##n_j=\epsilon^{a-1+bu_j}=\epsilon^{a-1}\epsilon^{bu_j}=A\epsilon^{bu_j}##
    [Based on the structure, those formulas would be equivalent without the minus sign and if ##\epsilon=e##.]
    => ##\ln(n_j)+a-1+bu_j## (that is not an equation)

    1:45-2:42 is some messy sketch.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Found a math equation graffitied on a wall. What's it trying to say?
  1. Say What? (Replies: 4)

  2. What the Fox say? (Replies: 21)

Loading...