"Jan Walzer" <jan### [at] lzernet> wrote in message
news:3b99dc57@news.povray.org...
> Hmm ... I believe you, if you say so, as I'm no native speaker ...
>
> But, what I wanted to say, I've never rotated something "about" another
> thing, but only "around" ....
> I never got the idea ... but if this is "true" english, please continue
and
> leave it this way ... just my $0.02

Um, "about" in that context does include the concept of rotating on an axis.
However, "around", to me, means orbital or from a point away from a center.
So saying about means what the idea is there rather than around which would
apply to rotations made away from the y axis.
Kind of the difference between rotation and revolution.  Maybe the word
revolve would be okay?  Or as in the following way:

...revolving the graph of a function on the y-axis...

It read so simply before too though  :-)

Bob H.

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