Fabius function
Appearance
In mathematics, the Fabius function is an example of a smooth function that is not analytic anywhere, found by Fabius (1966).
References
Fabius, J. (1966), "A probabilistic example of a nowhere analytic C∞-function", Z. Wahrscheinlichkeitstheorie und Verw. Gebiete, 5: 173–174, MR0197656