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Minkowski's question mark function
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English
Etymology
Defined by Hermann Minkowski in 1904.
Proper noun
Minkowski's question mark function
en math A function, denoted ?(x), with unusual fractal properties, mapping quadratic irrational numbers to rational numbers on the unit interval, via an expression relating the continued fraction expansions of the quadratics to the binary expansions of the rationals.
en eponyms