10.2 Definitions, Theorems, Proofs
10.2 Definitions, Theorems, Proofs Mathematical writing is built from a few basic parts. The most important are definitions, theorems, and proofs. A definition explains what a word or object means. A theorem states something true. A proof explains why it is true. These parts work together. A theorem uses words that must already be defined. A proof uses definitions and known facts to justify the theorem. If the definitions are...