This was my study repository for the 2019 Ph.D. written qualifying exam.
The notes cover the entirety of their respective courses, while quals only covers a subset of the materials. See the official exam archive to better understand which topic subsets deserve more attention.
M.C. Escher, Reptiles, 1943. Lithograph, 334 x 385 mm. Rosenwald Collection, National Gallery of Art, Washington D.C., USA.