When I was in graduate school in Princeton, I was told to take three courses. One of them to work on really hard, another to work on moderately hard,….

Certain functions appear so often that it is convenient to give them names. These are collectively called special functions. There are many examples ….

Combinatorial analysis, in the trivial sense of manipulating binomial and multinomial coefficients, and formally expanding powers of infinite series ….

If things are nice there is probably a good reason why they are nice: and if you do not know at least one reason for this good fortune, then you stil….

Like a stool which needs three legs to be stable, mathematics education needs three components: good problems, with many of them being multi-step one….