On August 12 2017, Archimedes Plutonium wrote: > Easy experiment, easy, even the High School student can verify in a half hour, that the conic section is never an ellipse but an oval > > Get some stiff wax paper like a magazine cover and roll it into a cylinder and with scotch tape tape it secure, then roll another into a cone shape and scotch tape. now get a scissors (or paper cutter unless dangerous) and proceed to cut the cone and cut the cylinder. You will find that the cylinder section is truly a ellipse, but the cone section is going to be a oval. A ellipse has two axes of symmetry while the oval has only one axis of symmetry. The reason no ellipse can come from a cone is the fact that the upper parts of the section have far less area than the lower section. In a cylinder, the upper and lower are equals. > > So, this is a major mistake in geometry started since Ancient Greek times way back to Euclid. > > Now the Ancient Greeks seldom if ever did a hands on experiment. They liked to do everything in their head, which often can get you the wrong answer. > > Now, in modern times there is no excuse for not doing this experiment. You simply get a cylinder and a cone of about the same size and you make a oblique angle cut and see what figure comes out. In the Cylinder cut, the figure is a ELLIPSE, yet in the Cone cut the figure is a OVAL. > > Now here is a short list of math failures who just cannot be bothered to hands on experiment but rather are failures of mathematics for all they can do is dictate that the ellipse is a conic section. Dictate because they are far far too stupid to ever actually experiment to see if their memorized crap on conics is really true, or, just memorized crap. > > Markus Klyver > Jan Burse > Dan Christensen > Jan Bielawski > Terry Tao > Andrew Wiles > John Conway > Appel & Haken > qbwrfmix > Eastside > Konyberg KON > Beal, of Beal conjecture > Robin Hartshorne > > All of them, failures of mathematics, for they never are able to get beyond memorization of mathematics, whether utterly false math, and worst yet, they preach this crap to younger generations and scold the young students-- who are smarter than the mathematician on conics. > > So, I discovered the oval was the conic section, never the ellipse and I discovered that in 2016, and yet, here it is 2017, and one would think the math community would be grateful for the correction to their error. Instead, the math community continues to ignore anyone outside the inner circle of mathematics, who shows where they are fully mistaken. > > I always thought until the last 25 years that mathematicians are some of the most honest people in the world, when it comes to truth, but in fact, I keep finding out that mathematicians are one of the most corrupt crazy minds in science. > > It has been a year since the discovery of Oval is ellipse, and still not a peep out of math community. > > Newsgroups: sci.math > Date: Wed, 28 Dec 2016 13:25:46 -0800 (PST) > > Subject: getting an ellipse from a conic cut-- possible or impossible?? > probably a unique cut > From: Archimedes Plutonium <plutonium....@gmail.com> > Injection-Date: Wed, 28 Dec 2016 21:25:47 +0000 > > Discoveries like this deserve attention, and not hidden by suppression fools with their own greedy axes to grind. So, I list the names of everyone in geometry, who should have cleared up and cleaned out the mistake, but is hiding and ignoring, and failing mathematics with their ignoring. > > AP
You know, you are almost right, but not totally. The problem is a matter of point of view. Ellipse IS a conic section. To see the ellipse after you cut a cone, you must look perpendicularly to the cutting plane. If you don't, then the only thing you'll see is an oval.
You're not convinced? Don't trust my word. Experiment by yourself. Don't thank me. Enjoy!