Timeline for What happens to Virasoro at c=25?

8 events

when toggle format	what		by	license	comment
Jul 13, 2014 at 16:54	comment	added	Sebastien Palcoux		I have posted a development of the last question of my answer here
Oct 13, 2013 at 13:50	comment	added	Sebastien Palcoux		@AndréHenriques : $\Delta = \beta^{2}-4\alpha \gamma$ is the discriminant of the polynomial $\alpha x^{2}+\beta x+\gamma$. To avoid confusion : here $\alpha = c-1$, $\beta=c-1$ and $\gamma = 6$.
Oct 13, 2013 at 12:52	comment	added	André Henriques		What is $\Delta$?
Oct 13, 2013 at 10:35	comment	added	Sebastien Palcoux		@S.Carnahan : The observation that $\Delta = (c-1)(c-25)$ is an easy way to obtain $1$ and $25$, and it's coherent with your answer with $26-c$ : if I'm not mistaken, the negative highest weight discrete series have central charges $c_{m} = 25 + \frac{6}{m(m+1)}$, and the equations $c=c(x)=25 + \frac{6}{x(x+1)}$ gives the same $\Delta = (c-25)(c-1)$. Now, I'm agree that the questions about the space-time dimension of the $N$-superstring theory, deserve their own post. I will post it.
Oct 13, 2013 at 1:03	comment	added	S. Carnahan♦		This appears to be more appropriate as a question than as an answer.
Oct 12, 2013 at 10:14	history	edited	Sebastien Palcoux	CC BY-SA 3.0	I improve a little the shape.
Oct 12, 2013 at 8:35	history	edited	Sebastien Palcoux	CC BY-SA 3.0	I add a remark on superstring theory
Oct 12, 2013 at 8:20	history	answered	Sebastien Palcoux	CC BY-SA 3.0