When it comes to coin collecting, it's hard to beat the appeal of the United States Mint proof set. These sets of ...

The book begins by gently introducing proof-based thinking by posing well-motivated prompts and exercises concerning ... The book proceeds with introducing formal logic, mathematical induction, set ...

Core topics include proof techniques, sets, functions, relations, and cardinality, with selected additional topics that provide many possibilities for further exploration. With a problem-based ...

The United States Mint (Mint) began accepting orders for the 2024 American Innovation $1 Coin Reverse Proof Set on December ...

The mint in San Francisco made more than 2.8 million special uncirculated "proof" sets in 1975 that featured six coins and ...