## Life of Fred Mathematics

### Life of Fred: Five Days

(Sampler of Advanced Upper Division Math)

Upper division (junior/senior) pure math is much different than calculus. No "word problems," no formulas to memorize, no concrete applications – just puzzles to solve. Instead of learning procedures, students create definitions, theorems, and proofs. These are the first five days of Fred's teaching set theory, modern algebra, abstract arithmetic, and topology.

The first day of set theory:- Cardinality of a set
- Set builder notation
- Naive set theory
- Modus ponens
- Seven possible reasons to give in a math proof
- The high school geometry postulates are inconsistent
- he proof that every triangle is isosceles
- normal sets.

- Definition of a math theory
- Six properties of equality
- Formal definition of a binary operation
- Formal definition of a function
- Definition of a group
- right cancellation law
- Left inverses
- commutative law

- Circular definitions
- Unary operations
- The successor function
- Natural numbers
- The five Peano postulates
- Mathematical induction

- Topology is all about friendship
- Listed and counting subsets
- Open sets
- The discrete topology
- The three axioms of a topology
- Models for a topology
- open intervals

- 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)

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.

All answers are included in the textbook.

Click here to view a sample lesson (Opens in a new window or tab)

Life of Fred Five Days of Upper Division Math is a hardcover textbook containing 208 pages. This book is not consumable. All answers are written on separate paper or in a notebook.

Number of Lessons: 139 assignments. It is not broken up into lessons.