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  2. Aliquot sequence - Wikipedia

    en.wikipedia.org/wiki/Aliquot_sequence

    The aliquot sequence starting with a positive integer k can be defined formally in terms of the sum-of-divisors function σ 1 or the aliquot sum function s in the following way: [1] = = = > = = = If the s n-1 = 0 condition is added, then the terms after 0 are all 0, and all aliquot sequences would be infinite, and we can conjecture that all aliquot sequences are convergent, the limit of these ...

  3. Summation by parts - Wikipedia

    en.wikipedia.org/wiki/Summation_by_parts

    The formula for an integration by parts is () ′ = [() ()] ′ (). Beside the boundary conditions , we notice that the first integral contains two multiplied functions, one which is integrated in the final integral ( g ′ {\displaystyle g'} becomes g {\displaystyle g} ) and one which is differentiated ( f {\displaystyle f} becomes f ...

  4. Dynkin's formula - Wikipedia

    en.wikipedia.org/wiki/Dynkin's_formula

    In mathematics — specifically, in stochastic analysis — Dynkin's formula is a theorem giving the expected value of any suitably smooth function applied to a Feller process at a stopping time. It may be seen as a stochastic generalization of the (second) fundamental theorem of calculus. It is named after the Russian mathematician Eugene Dynkin.

  5. Spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Spreadsheet

    Formulas in the B column multiply values from the A column using relative references, and the formula in B4 uses the SUM() function to find the sum of values in the B1:B3 range. A formula identifies the calculation needed to place the result in the cell it is contained within. A cell containing a formula, therefore, has two display components ...

  6. Formulas for generating Pythagorean triples - Wikipedia

    en.wikipedia.org/wiki/Formulas_for_generating...

    Michael Stifel published the following method in 1544. [3] [4] Consider the sequence of mixed numbers,,,, … with = + +.To calculate a Pythagorean triple, take any term of this sequence and convert it to an improper fraction (for mixed number , the corresponding improper fraction is ).

  7. 49ers QB Brock Purdy leaves loss to Lions with elbow injury ...

    www.aol.com/sports/49ers-qb-brock-purdy-leaves...

    An elbow injury sidelined San Francisco's Brock Purdy late in the fourth quarter of the 49ers' loss to the Detroit Lions on Monday night after the quarterback took a sack in the final minutes.

  8. Jets eliminated from playoff contention, extending NFL-worst ...

    www.aol.com/jets-eliminated-playoff-contention...

    The New York Jets' trying season has hit a new low – yet one long familiar to the franchise.. With Sunday's 32-26 overtime loss to the Miami Dolphins, the Jets (3-10) were officially eliminated ...

  9. “What’s The Most Frugal Thing You Do?” (50 Answers) - AOL

    www.aol.com/lifestyle/people-shared-66-most...

    Image credits: Sad_Goose3191 #6. A habit I learned from my mom as I grew up that I still do today: we usually had protein, a carb and two side dish vegetables for dinner most nights, and she used ...