Families and dichotomies in the circle method, Ph.D. Thesis, Princeton University, 2022.
URL: http://arks.princeton.edu/ark:/88435/dsp01rf55zb86g (in Princeton's DataSpace).
An unofficial single-spaced version (131 pages), differing mostly in the page numbering, can be found here
(with main source here and full source here).
Note: Papers I, II, III below can be read independently.
See here for some short descriptions of I, II, III and other related work.
Links to individual papers and drafts
(The following are roughly listed in reverse chronological order, at least morally.)
Paper III:
Sums of cubes and the Ratios Conjectures