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Topic: 6) Is Wolfgang Rautenberg, Gerhard Ringel, Peter Roquette also trying
to teach-spread fake-math like Franz? For Conic is Oval, never ellipse
(proofs provided)

Replies: 3   Last Post: Oct 6, 2017 3:10 PM

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Re: 6) Is Wolfgang Rautenberg, Gerhard Ringel, Peter Roquette also
trying to teach-spread fake-math like Franz? For Conic is Oval, never ellipse
(proofs provided)

Posted: Oct 6, 2017 3:10 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On Friday, October 6, 2017 at 10:53:27 AM UTC+2, Archimedes Plutonium wrote:

Ellipse:

> c_1X^2 + c_2Y^2 - 1 = 0

Right, Archie.

Sometimes you will find it written the following way:

x^2/a^2 + y^2/b^2 = 1 .

"The shape parameters a, b are called the semi major axis and semi minor axis."

Hint: "It follows from the equation that the ellipse is symmetric with respect to both of the coordinate axes and hence symmetric with respect to the origin."

Source: Wikipedia



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