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Bolzano's Continuous but Nowhere Differentiable Function


	Bolzano discovered this continuous but nowhere differentiable function before 1831, but these investigations were not published until 1930. Weierstrass found an analogous function in 1875. The function is the limit of the ones graphed as .


	Contributed by: Izidor Hafner

K. A. Rybnikov, A History of Mathematics (in Russian), Moscow: Moscow University Press, 1974 pp. 336–339.

Riemann's Example of a Continuous but Nowhere Differentiable Function (The Wolfram Demonstrations Project)

Takagi Curve (The Wolfram Demonstrations Project)

The Generalized Weierstrass-Riemann Functions (The Wolfram Demonstrations Project)

Weierstrass Function (Wolfram MathWorld)

"Bolzano's Continuous but Nowhere Differentiable Function" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/BolzanosContinuousButNowhereDifferentiableFunction/

Contributed by: Izidor Hafner

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