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  2. Knuth's up-arrow notation - Wikipedia

    en.wikipedia.org/wiki/Knuth's_up-arrow_notation

    The sequence starts with a unary operation (the successor function with n = 0), and continues with the binary operations of addition (n = 1), multiplication (n = 2), exponentiation (n = 3), tetration (n = 4), pentation (n = 5), etc. Various notations have been used to represent hyperoperations.

  3. List of mathematical series - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_series

    2.5 Binomial coefficients. 2.6 Harmonic numbers. 3 Binomial coefficients. 4 Trigonometric functions. 5 Rational functions. 6 Exponential function. 7 Numeric series.

  4. Harmonic distribution - Wikipedia

    en.wikipedia.org/wiki/Harmonic_distribution

    [2] The harmonic law is the only one two-parameter family of distributions that is closed under change of scale and under reciprocals, such that the maximum likelihood estimator of the population mean is the sample mean (Gauss' principle). [3] In 1946, Halphen realized that introducing an additional parameter, flexibility could be improved.

  5. Catalan's constant - Wikipedia

    en.wikipedia.org/wiki/Catalan's_constant

    In low-dimensional topology, Catalan's constant is 1/4 of the volume of an ideal hyperbolic octahedron, and therefore 1/4 of the hyperbolic volume of the complement of the Whitehead link. [4] It is 1/8 of the volume of the complement of the Borromean rings. [5]

  6. Binomial coefficient - Wikipedia

    en.wikipedia.org/wiki/Binomial_coefficient

    Alternative notations include C(n, k), n C k, n C k, C k n, [3] C n k, and C n,k, in all of which the C stands for combinations or choices; the C notation means the number of ways to choose k out of n objects. Many calculators use variants of the C notation because they can represent it on a single-line display.

  7. Doctors Say This Is How You Can Loosen and Clear Mucus From ...

    www.aol.com/doctors-loosen-clear-mucus-chest...

    Breathe in the steam for 5-10 minutes. Consider essential oils. As mentioned above in assistance with steam therapy, some essential oils can help clear phlegm out of your airways. Essential oils ...

  8. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    For every 3 non-theme words you find, you earn a hint. Hints show the letters of a theme word. If there is already an active hint on the board, a hint will show that word’s letter order.

  9. Scalar projection - Wikipedia

    en.wikipedia.org/wiki/Scalar_projection

    Vector projection of a on b (a 1), and vector rejection of a from b (a 2). In mathematics, the scalar projection of a vector on (or onto) a vector , also known as the scalar resolute of in the direction of , is given by: