Four normals drawn from a point to an ellipse. (Q1487081)
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scientific article; zbMATH DE number 2634587
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Four normals drawn from a point to an ellipse. |
scientific article; zbMATH DE number 2634587 |
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Four normals drawn from a point to an ellipse. (English)
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1910
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Involutorische Geradentransformation. Der Geraden \(ux+vy+1=0\) den Koordinaten \(u, v\) ist zugeordnet \(u', v'\), wo \(uu'=-1/a^2\), \(vv'=-1/b^2\) \((a^2\neq b^2; a\neq 0, b\neq 0)\). Interessante Beziehungen zur Ellipse \(b^2x^2+a^2y^2-a^2b^2=0\). (Vgl. F. d. M. 40, 638, 1909, JFM 40.0638.02).
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