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  2. Frobenius solution to the hypergeometric equation - Wikipedia

    en.wikipedia.org/wiki/Frobenius_solution_to_the...

    But the solution at z = 0 is identical to the solution we obtained for the point x = 0, if we replace each γ by α + β − γ + 1. Hence, to get the solutions, we just make this substitution in the previous results. For x = 0, c 1 = 0 and c 2 = 1 − γ. Hence, in our case, c 1 = 0 while c 2 = γ − α − β. Let us now write the solutions.

  3. 1 − 2 + 3 − 4 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%E2%88%92_2_%2B_3_%E2%88...

    The idea becomes clearer by considering the general series 1 − 2x + 3x 2 − 4x 3 + 5x 4 − 6x 5 + &c. that arises while expanding the expression 1 ⁄ (1+x) 2, which this series is indeed equal to after we set x = 1.

  4. Appell series - Wikipedia

    en.wikipedia.org/wiki/Appell_series

    In mathematics, Appell series are a set of four hypergeometric series F 1, F 2, F 3, F 4 of two variables that were introduced by Paul Appell () and that generalize Gauss's hypergeometric series 2 F 1 of one variable.

  5. 2,4,5-Trimethoxyphenethylamine - Wikipedia

    en.wikipedia.org/wiki/2,4,5-Trimethoxyphenethylamine

    2,4,5-Trimethoxyphenethylamine (2,4,5-TMPEA or TMPEA-2), also known as 2C-O or 2C-OMe, or is a phenethylamine of the 2C family and was first synthesized by Jansen in 1931. [1] It is a positional isomer of the drug mescaline (3,4,5-tri methoxy ).

  6. Quintic function - Wikipedia

    en.wikipedia.org/wiki/Quintic_function

    An example of a more complicated (although small enough to be written here) solution is the unique real root of x 5 − 5x + 12 = 0. Let a = √ 2φ −1, b = √ 2φ, and c = 45, where φ = ⁠ 1+ √ 5 / 2 ⁠ is the golden ratio. Then the only real solution x = −1.84208... is given by

  7. Big O notation - Wikipedia

    en.wikipedia.org/wiki/Big_O_notation

    For example, let f(x) = 6x 4 − 2x 3 + 5, and suppose we wish to simplify this function, using O notation, to describe its growth rate as x approaches infinity. This function is the sum of three terms: 6x 4, −2x 3, and 5. Of these three terms, the one with the highest growth rate is the one with the largest exponent as a function of x ...

  8. Four-center two-electron bond - Wikipedia

    en.wikipedia.org/wiki/Four-center_two-electron_bond

    A 4-center 2-electron (4c–2e) bond is a type of chemical bond in which four atoms share two electrons in bonding, with a net bond order of 1 ⁄ 2. This type of bonding differs from the usual covalent bond, which involves two atoms sharing two electrons (2c–2e bonding). Four-center two-electron bonding is postulated in certain cluster ...

  9. Quine–McCluskey algorithm - Wikipedia

    en.wikipedia.org/wiki/Quine–McCluskey_algorithm

    The rows with minterm m(4,12) and m(10,11,14,15) can now be removed, together with all the columns they cover. The second prime implicant can be 'covered' by the third and fourth, and the third prime implicant can be 'covered' by the second and first, and neither is thus essential.