Question for the Adobe Illustrator team or anyone who might know

Question

Is Adobe Illustrator meant only to use Bezier curves? I know that they are very useful for a number of curves, but are they used to approximate circles? Granted, all screens require rasterized objects to the nearest pixels in order to display them, but when drawing a circle, information is lost because it is converted into 4 Bezier curves (cubic or quadratic, I'm not sure). However, when I export a circle from Adobe Illustrator CS5 to SVG it preserves the circle or ellipse's information with its proper tag.
So, my question is, does the Adobe Illustrator Artboard file format have some internal representation of ellipses and circles such that it it not broken down into Bezier curves?

Answer 1

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when I export a circle from Adobe Illustrator CS5 to SVG it preserves the circle or ellipse's information with its proper tag.
So what? That means nothing. You're just talking about terms within a progamming language. One could program Illustrator to export a freakin' square as SVG's circle tag if one wanted to.
As explained in your previous thread about the same worry-wart subject:
There being a "circle element" in SVG programming, in itself, means nothing. I can write you a Javascript called "Illustrator's Circle Element" that will work in Illustrator, that will prompt you for center coordinates and a radius, that will appear in one of Illustrator's menus, and that will cause Illustrator to render that which for any practical purpose is a circle. The presence of such a command in no way signifies to you what kind of curve-rendering math is employed by that "element" to actually plot the curve!
By the same token, SVG's providing something called a "circle element" in its API and asking you to specify it in terms of center and radius in no way tells you what kind of curve-rendering math is actually being employed to render the curve, nor does it ensure that its rendered result will be any more precisely mathematically circular than rendered by a cubic Bezier curve. If you don't know for a fact that SVG's rendering math does not employ Bezier curves, then your concern is moot.
It's moot anyway, because it's ridiculous. Again: the "inaccuracy" is so tiny as to be completely pointless for any practical SVG purpose.
Again: You are reading entirely too much into a mere popularly-cited curiosity about the cubic Bezier equation. You are being silly; you just don't realize it.
Illustrator's (i.e; PostScript's) using Bezier math to plot curves does not make Illustrator (or any of the similar programs) in any way "sub standard" or "less accurate" or "less desirable" or more "dumbed down" than any other. In fact, here are some other related curiosities for you to loose sleep over:
The math primarily used for plotting curves in most CAD programs is quite arguably "more crude" than Bezier curves.
Illustrator uses cubic Beziers. TrueType uses quadratic Beziers. But there are Bezier equations of higher order than cubic.
(If I remember right) Bezier himself discovered the formulae bearing his name in pursuit of more supple curves for the automotive industry.
If you're still worried about this, you really need to go take a couple of math courses, so you can understand that this really is silly.
JET