Isotone Map

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More things to try:

• (15/9) / (3/4)
• eccentricity of an ellipse with semiaxes 12,1
• lim (f(x+h) - 2f(x) + f(x-h)) / h^2 as h->0

Cite this as:

Weisstein, Eric W. "Isotone Map." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/IsotoneMap.html

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