9780192806727.pdf

UNIFIED FIELD THEORY 339 are necessary and sufficient conditions for a Riemann space to be everywhere flat (pseudo-Euclidean). N ...

340 THE LATER JOURNEY consequence of the advent of general relativity, as is seen from persistent reference to that theory in al ...

are both gauge-invariant tensors. So, therefore, is R^ (which is not symmetric now); R is a scalar but is not gauge invariant: R ...

(recall that R^ = 0 in the Riemannian case because of Eq. 17.29). Eddington therefore suggested that R^ play the role of electro ...

UNIFIED FIELD THEORY 343 an equation akin to an Einstein equation with a cosmological constant. Then from Eqs. 17.47 and 17.48 w ...

344 THE LATER JOURNEY in this new version. Thus there are eighty fundamental fields, all of which are to be varied independently ...

where 1"^ is defined by the rhs ot Eq. 17.21 (it follows Irom Eq. 17.25 that A^ is a true tensor). He hoped to be able to identi ...

346 THE LATER JOURNEY itational and electromagnetic fields are separated, an old difficulty. There the mat- ter rested for sever ...

UNIFIED FIELD THEORY 347 Einstein's colleagues were not impressed. Eddington [E63] and Weyl [W6] were critical (for other views, ...

348 THE LATER JOURNEY From 1945 until the end. The final Einstein equations. Einstein, now in his mid-sixties, spent the remaini ...

UNIFIED FIELD THEORY 349 could have particle-like solutions. This plan had failed in 1925. It failed again this time. I summariz ...

350 THE LATER JOURNEY none of his doing* that a page of his manuscript appeared on the front page of The New York Times under th ...

UNIFIED FIELD THEORY 351 In his attempts to generalize general relativity, Einstein had from the very beginning two aims in mind ...

352 THE LATER JOURNEY E19. , PAW, 1927, p. 23. E20. , PAW, 1927, p. 26. E21. , letter to P. Ehrenfest, August 23, 1926. E22. , l ...

UNIFIED FIELD THEORY 353 E64. A. Einstein, letter to W. Pauli, December 24, 1929. E65. , letter to W. Mayer, January 1, 1930. E6 ...

354 THE LATER JOURNEY N5. New York Times, December 27, 1949. N6. New York Times, December 28, 1949. N7. New York Times, March 30 ...

VI THE QUANTUM THEORY Apart, adv., 4. Away from others in action or function; separately, independently, individually.... Oxford ...

This page intentionally left blank ...

i8 Preliminaries 18a. An Outline of Einstein's Contributions In 1948, I undertook to put together the Festschrift in honor of Ei ...

358 THE QUANTUM THEORY The critical reaction to Einstein's light-quantum hypothesis of 1905 is of great importance for an unders ...