Essentially all computer algebra systems offer some graphic
primitives or functions. So it is not surprising that some also offer
the possibility of doing animations. With progress in software and some
experience, the time cost of building animations has decreased to an
Animations have therefore the potential to become a common
pedagogical tool for the first time in the history of mathematics.
Obvious uses are the depiction of phenomena that evolve in time: the
motion of a pendulum, the evolution of populations in a prey-predator
model, etc. But animations can also be used to clarify mathematical
ideas or constructions where time plays no role. I will present and
discuss some animations of this latter type.