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four focal points and directric circles

Autor:Walter Füchte

Temat:Koło, Parabola, Figury lub kształty na płaszczyźnie, Symetria

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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