On Tue, Feb 28, 2012 at 5:12 AM, Boris Zbarsky <bzbarsky@mit.edu> wrote: > On 2/28/12 3:01 AM, Kang-Hao (Kenny) Lu wrote: >> >> I am not sure this is well-defined as I don't know if concentric >> ellipses are by definition necessarily having the same eccentricity. > > They're not. > > >> I don't mean to use www-style as a Math forum but oddly enough I >> couldn't find the definition of "concentric ellipses" on Google. > > When people say "concentric ellipses" they seem to mean non-intersecting > ellipses with shared center and major axes pointing in the same direction. > Or something. There is no commonly accepted definition I know of, other > than "I know it when I see it". Huh. I thought there was a simple definition (linearly scale both axises). I'll do some quick testing to see what impls do and ensure it matches what I assume, then specify that more clearly. ~TJReceived on Tuesday, 28 February 2012 16:08:34 UTC
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