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four focal points and directric circles

作者：Walter Füchte

主題：圓, 複數, 拋物線, Plane Figures or Shapes, 對稱

06.08.2023
Only for

: implicit equation of the curve

this is a bicircular quartic
with and ; with the real function .

Elliptic differential equation for a elliptic function

:

for a suitable .

Solution curves are confocal bicirkular quartics. Link

elliptic functions & pencils of circles & bicircular quartics ...

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