Corrections to The Road to Reality by Roger Penrose (Knopf, 2005)

Note: This errata page lists only errors which, at the time of discovery, were not already posted on Penrose’s page (http://www.roadsolutions.ox.ac.uk).

Page #	Top, Middle, or Bottom	Description of Error
101	MB	A particle that can exist on its own only if its quarkiness is 1. [Delete extra word.]
109	B	[Legend for Fig. 6.5(f) should read y = –2 + 4q(x), not y = 2 + 4q(x). The negative sign is missing.]
120	M	Yet the delta function does finds a clear mathematical definition within various broader classes of mathematical entities, the best known being distributions. [Delete extra word.]
121	MB	[In footnote 6.10, “Priestly” should be corrected to “Priestley.” Compare with footnote 4.9 on p. 85 and with bibliography on p. 1077.]

Last updated: 02 Apr 2005