There is also a proof for 26 dimensions...its somewhat arbitrary. Understanding the right amount seems to be the troublesome part.
26 dimensions applies to the bosonic string theory. If you want to include matter (supersymmetry on the worlsheet) you need fermionic degrees of freedom. This in turn requires 10 dimensions. Exactly, no freedom, the calculation is somewhat elementary (compared to the rest in this field).There is also a proof for 26 dimensions...its somewhat arbitrary. Understanding the right amount seems to be the troublesome part.
I'm only an amateur (still a student), so I'm just wondering: is what you're referring to the concept of the 4th dimension of time actually being a spatial dimension?The thing that I am most intrigued with is the possibility to have a 4 dimensional twistor string geometry. Quite an amount of this business has been developped by Witten.
It seems the only thing that has been determined in this thread is that the word "dimension" and exactly how many of them there are seem to be relative to the poster and/or physicist. While we can define the word dimension, it tends to be open ended (which is why you're getting a lot of guesses as to how many there are). This is still really interesting physics and the reason I even registered for this BB.Are these 10,11,26 dimensions real or complex?