Upper division (junior/senior) pure math is much different than calculus.
These are the first five days of Fred’s teaching set theory, modern algebra, abstract arithmetic, and topology. Each of the 139 assignments/puzzles/questions that he gives his students calls for creativity rather than doing drill work. Some of these can be done in a minute. Some will take several hours to complete. They are all meant to be enjoyed. The goal is not to finish the book. It’s just like life.
By the fifth day Fred will have covered the Schröder-Bernstein theorem (set theory), proved Lagrange’s theorem for subgroups of any group (modern algebra), defined the real numbers based only on the concept of “adding one” (abstract arithmetic), and explored continuous images of compact sets (topology).
