Although I often draw a circle on the white-board that leaves something
to be desired, my circles are indeed more, well, circlular rather than
hyperbolic. I meant y = sqrt(25 - x^2).
Also, the current definition of function does indeed allow many
arguments to one value, but does not allow one argument to many values.
Notice I spelled out the many-what to one-what because I couldn't find a
clear consensus on whether one-to-many means one value for many
arguments or one argument for many values.
Michael D. Edmiston, Ph.D.
Professor of Physics and Chemistry
Chair of Sciences
Bluffton College
Bluffton, OH 45817
(419)-358-3270
edmiston@bluffton.edu
This posting is the position of the writer, not that of SUNY-BSC, NAU or the AAPT.