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Date: Thu, 18 Sep 1997 22:36:22 -0600
From: Jim Green <JMGreen@sisna.com>
If a line is a curve, what is the difference between a non-straight line and
a curvy curve?
None; it's a historical usage now mostly seen in "line integral" or "line of
force" or "field line" to let "line" mean the same as "curve" or "path" or
"arc". Mathematicians generally treat "line" and "straight line" as
synonyms, making an exception for these historic remnants (which occur
mostly in applied areas).