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  2. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  3. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 metres (⁠ 1 / 1 000 ⁠ m = 0.001 m). To help compare different orders of magnitude , this section lists lengths between 10 −3 m and 10 −2 m (1 mm and 1 cm).

  4. Fixed point (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Fixed_point_(mathematics)

    Let ≤ be a partial order over a set X and let f: X → X be a function over X. Then a prefixed point (also spelled pre-fixed point, sometimes shortened to prefixpoint or pre-fixpoint) [citation needed] of f is any p such that f(p) ≤ p. Analogously, a postfixed point of f is any p such that p ≤ f(p). [3] The opposite usage occasionally ...

  5. Margrabe's formula - Wikipedia

    en.wikipedia.org/wiki/Margrabe's_formula

    Suppose S 1 (t) and S 2 (t) are the prices of two risky assets at time t, and that each has a constant continuous dividend yield q i. The option, C, that we wish to price gives the buyer the right, but not the obligation, to exchange the second asset for the first at the time of maturity T. In other words, its payoff, C(T), is max(0, S 1 (T ...

  6. Zoom lens - Wikipedia

    en.wikipedia.org/wiki/Zoom_lens

    The Kilfitt 36–82 mm/2.8 Zoomar lens introduced in 1959 was the first varifocal lens in regular production for still 35mm photography. [8] The first modern film zoom lens, the Pan-Cinor, was designed around 1950 by Roger Cuvillier , a French engineer working for SOM-Berthiot .

  7. Heinrich Martin Weber - Wikipedia

    en.wikipedia.org/wiki/Heinrich_Martin_Weber

    Weber, Heinrich Martin (1981) [1898], Lehrbuch der Algebra (in German), vol. 3 (3rd ed.), New York: AMS Chelsea Publishing, ISBN 978-0-8218-2971-4 The third volume is an expanded version of his earlier book "Elliptische Functionen und algebraische Zahlen".

  8. Change is coming in how math is taught in NC schools. But ...

    www.aol.com/change-coming-math-taught-nc...

    Amid a decade of state and national fighting over math instruction, North Carolina education officials have a new message: “Math is for everyone.” Change is coming in how math is taught in NC ...

  9. Mathematics Subject Classification - Wikipedia

    en.wikipedia.org/wiki/Mathematics_Subject...

    The Zentralblatt MATH page on the Mathematics Subject Classification. MSC2020 can be seen here. Mathematics Subject Classification 2010 – the site where the MSC2010 revision was carried out publicly in an MSCwiki. A view of the whole scheme and the changes made from MSC2000, as well as PDF files of the MSC and ancillary documents are there.