Aimed at second year graduate students, this text introduces them to cohomology theory (involving a rich interplay between algebra and topology) with a minimum of prerequisites. No homological algebra is assumed beyond what is normally learned in a first course in algebraic topology, and the basics [...]

A century before psychoanalytic discourse codified a scientific language to describe the landscape of the mind, Johann Wolfgang von Goethe explored the paradoxes of an interior self separate from a conscious self. Though long acknowledged by the developers of depth psychology and by its historians, [...]