[ringmaster]

In the Introduction, under functions:

  f = m*a
  f(20) = 20a

Which is ok, but then farther down:

  f(a) = m*a
  f(20) => 20a

This seems incorrect, since I was expecting m*20. On a separate page, this seems to work fine, though.

Otherwise, quite nice.

[praeclarum]

Bug in the doc. :-) just ran on the device and got the expected:

    f(a) = m*a
    f(20) => 20m