Witch of Agnesi

Witch of Agnesi

The Witch of Agnesi is a mathematical curve named after Maria Gaetana Agnesi, an Italian mathematician and philosopher of the 18th century. The curve is also known as the "versiera" or "versicula" curve. It gained its peculiar name due to a mistranslation of the Italian word "avversiera," which means "she who opposes."

Definition

The Witch of Agnesi is defined by the equation:

{{{1}}} }

where 'a' is a positive constant representing the radius of the curve.

Properties

The Witch of Agnesi is a special case of the more general class of curves known as the cubic curves. It is a symmetrical curve that is always concave up. As x approaches positive or negative infinity, the curve approaches the x-axis. The highest point on the curve is at x = 0, where it intersects the y-axis at y = 2a.

Origin of the Name

The name "Witch of Agnesi" was coined by Pierre-Simon Laplace, a French mathematician, in the late 18th century. Laplace misinterpreted the Italian word "avversiera" as "avversiere," which means "witch" in Italian. This misinterpretation led to the curve being known as the Witch of Agnesi.

Applications

Although the Witch of Agnesi may not have direct practical applications, it has been studied extensively in mathematics. It serves as an example of a curve with interesting properties and has been used in various mathematical proofs and calculations.

Related Concepts

The Witch of Agnesi is closely related to other mathematical concepts, such as the cubic curves, which include the famous cubic parabola. It is also related to the concept of asymptotes, as the curve approaches the x-axis as x approaches positive or negative infinity.

References

- ,

 Concepts of Modern Mathematics, 
  
 Dover Publications, 
 1995, 
  
  
 ISBN 978-0486284248,

- ,

 Analytical Institutions, 
 Opuscula Mathematica, 
 1748,
 Vol. 2(Issue: 1),
 pp. 1–100,

See Also

- Maria Gaetana Agnesi

- Cubic curve

- Asymptote (mathematics)

- List of mathematical curves

• 
  Witch of Agnesi curves
• 
  Witch of Agnesi construction
• 
  Witch of Agnesi
• 
  Witch of Agnesi (Agnesi, 1748)