[ExI] Renormalization (was End of time?)

[scerir]

[Avantguardian writes] 
Regarding this practice of "regularization" or renormalization in physics, 
Dirac 
said,  "Most physicists are very satisfied with the situation. They say: 
'Quantum 
electrodynamics is a good theory and we do not have to worry about it any 
more.' 

# As far as I remember Ed Witten, in his 'Newton lecture (2010)', says 
something
about that, from the p.o.v. of a string theorist of course. Since the speaker 
is
Ed Witten it would be interesting to find out it, maybe.
 http://www.iop.org/resources/videos/lectures/page_44292.html