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

Quantum geometry

  1. Jul 27, 2003 #1
    in the next link there is an article about quantum geometry:http://www.maths.qmw.ac.uk/~majid/qgeom.html
    i would like to know how was the second equation derived?:
  2. jcsd
  3. Jul 27, 2003 #2


    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    Hello Loop,

    What Majid means by "quantum geometry" is very different from what Abhay Ashtekar means by it----that is, what it means in the context of LQG.

    Majid's website is largely an advertisement for Majid's personality and Majid's book. He does not explain enough so that one can derive anything.

    I think you left off a couple of parentheses when you copied
    f'(x) = (f(x)-f(qx))/(1-q)x.

    This is a finite difference approximation to the ordinary derivative f'(x)
    which is the limit of that expression as q --> 1
    If you make q very close to 1 then that formula will tend to approach the ordinary derivative. Like, try 0.999 for q.
    So what's the big deal?

    It strikes me as teasing instead of teaching----he tells just enough to get you interested and then tries to sell you his book.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Quantum geometry
  1. 3D geometry (Replies: 18)

  2. Geometry Question? (Replies: 5)

  3. Geometry Preparation (Replies: 7)

  4. Geometry of an Egg (Replies: 6)