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witch of Agnesi

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witch of Ag·ne·si  (än-yz)
n.
A planar cubic curve that is symmetric about the y-axis and that approaches the x-axis as an asymptote. Its equation is x2y = 4a2(2a - y), where a is a constant.
[witch (translation of Italian avversiera, versiera, confused with versiera, curve, turning, from New Latin versria, from Latin versus, turned, reversed; see verse1) + Maria Gaetana Agnesi (1718-1799), Italian mathematician.]
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witch of Agnesi
MX : MY = ON : OM
witch of Agnesi  (wch v än-yz)
A planar cubic curve that is symmetric about the y-axis and that approaches the x-axis as an asymptote. Its equation is x2y = 4a2(2a - y), where a is a constant.


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