
New York City, AMS meeting, 28 December, 1928
6th Josiah Willard Gibbs Lecture
An introduction to number theory
Delivered in absence due to ill health by H W Brinkmann, Harvard
Published in Bulletin of AMS, 35 (1929), 778818
Awarded Chauvenet Prize by MAA
Lehigh University, 11 January, 1929
Hilbert's mathematical logic
Ohio State University, 18 January, 1929
The theory of primes
University of Chicago, 21 January, 1929
The analytic theory of numbers
California Institute of Technology, 27 January15 March, 1929
Lectures on the analytic theory of numbers
University of California at Los Angeles, 1 and 5 March, 1929
Titles?
University of California at Berkeley, 712 March, 1929
Hitchcock Lectures (subject?)
University of Iowa, 23 March, 1929
Hilbert's logic
New York City, meeting of AMS, 29 March, 1929
Modern work in the theory of ordinary trigonometric series
Columbia University, 1718 April, 1929
Prime numbers
University of Cincinnati, November, 1936
Spoke in symposium
Harvard Mathematical Colloquium, 3 December, 1936
Some of Ramanujan's work in number theory
Carathéodory was visiting Harvard from Munich for the first part of 
Ohio State University, 1617 January, 1928
University of Iowa, 1920 January, 1928
University of Chicago, 2324 January, 1928
University of Michigan, 2527 January, 1928
Adelbert College, 3031 January, 1928
Cornell University, 12 February, 1928
Harvard University, until c. 1 June, 1928
Wiiliam Lowell Putnam Lecture, 21 March, 1928
Selected problems of the caluculus of variations
University of California at Berkeley, Summer Session, 1928
With G C Evans and H B Phillips; but not otherwise listed (the next year, Weyl was one of four lecturers at UCB, with three at UCLA; all listed in advance)
University of Michigan, December, 1928
Columbia University, March, 1929
New York City, AMS Meeting, 30 March, 1929
Fourier series and almost periodic functions from the standpoint of groups
Harvard University, 29 April 3 May, 1929
University of Chicago, 7 May, 1929
University of Illinois, 810 May, 1929
Rice Institute, 2022, May, 1929
California Institute of Technology, 31 May3 June, 1929
Stanford University, 710 June, 1929
University of California at Berkeley
Summer Session, 1 July10 August, 1929
Representations of groups, applications and representations of groups for quantum mechanics
[It is sometimes remarked that mathematics on the West Coast of the USA got off to a somewhat slow and undistinguished start, but it is interesting to note that Carathéodory, Hardy, and Weyl all made the pilgrimage to California.]
Also touring in the USA in 1929 were P A M Dirac, from Cambridge, and E A Milne, from Oxford. Veblen was to try to get Dirac to Princeton for a period similar to Hardy's visit, but with substantial remuneration from Princeton, in contrast to the funds Veblen secured from the International Education Board for his exchange with Hardy; but Dirac was unable to come until the academic year 193031.
Dirac lectured on quantum mechanics at the University of Wisconsin in April and May, 1929. He and Milne were two of the four lecturers giving courses at a symposium on theoretical physics at the University of Michigan, 24 June16 August, 1929: Milne spoke on problems in astrophysics and vector and tensor methods in statics and dynamics; Dirac gave an introduction to quantum mechanics.
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