When solving a differential equation (with ode2 for example); maxima use
constant names such as %k, etc... I do not really understand the role of
the % sign. What is the difference between constants marked as %k in
comparison with just a letter (k). I know that there are some letters
(i,e for example) where the %i, %e design a specific known constant but
is there a rule in general.
Olive