1FROM ARITHMETIC TO ALGEBRA
10THE STORY OF A WORKING HYPOTHESIS
2THE MAKING OF ALGEBRAS
11MACBETH'S MISTAKE
3SIMULTANEOUS PROBLEMS
12JACOB'S LADDER
4PARTIAL SOLUTIONS AND THE PROVISIONAL ELIMINATION OF ELEMENTS OF COMPLEXITY
13THE GREAT X OF THE WORLD
5MATHEMATICAL CERTAINTY AND REDUCTIO AD ABSURDUM
14GO OUT OF MY CLASS-ROOM