Bounded variables with unbounded effectiveness
Walking: Animals are finite in extent and quite small in comparison
with their habitat.
Breathing: The lungs are of limited capacity, quite small in comparison
with the volume of air needed in a lifetime.
Internal combustion engines: the length of the stroke of a piston is
small in comparison with the number of miles a car will travel in its
In all these cases large motions are achieved by the repeated use of
small motions. The language we prefer is to say that large motions are
achieved through the rectification and integration of small motions.
Other words that might be used include generation of secular terms.
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