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  2. Erdős–Szemerédi theorem - Wikipedia

    en.wikipedia.org/wiki/Erdős–Szemerédi_theorem

    In arithmetic combinatorics, the Erdős–Szemerédi theorem states that for every finite set of integers, at least one of , the set of pairwise sums or , the set of pairwise products form a significantly larger set. More precisely, the Erdős–Szemerédi theorem states that there exist positive constants c and such that for any non-empty set.

  3. Petrick's method - Wikipedia

    en.wikipedia.org/wiki/Petrick's_method

    Based on the marks in the table above, build a product of sums of the rows. Each column of the table makes a product term which adds together the rows having a mark in that column: (K+L)(K+M)(L+N)(M+P)(N+Q)(P+Q) Use the distributive law to turn that expression into a sum of products.

  4. Algebraic data type - Wikipedia

    en.wikipedia.org/wiki/Algebraic_data_type

    In computer programming, especially functional programming and type theory, an algebraic data type (ADT) is a kind of composite type, i.e., a type formed by combining other types. Two common classes of algebraic types are product types (i.e., tuples and records) and sum types (i.e., tagged or disjoint unions, coproduct types or variant types).

  5. Sum and Product Puzzle - Wikipedia

    en.wikipedia.org/wiki/Sum_and_Product_Puzzle

    Sum and Product Puzzle. The Sum and Product Puzzle, also known as the Impossible Puzzle because it seems to lack sufficient information for a solution, is a logic puzzle. It was first published in 1969 by Hans Freudenthal, [1][2] and the name Impossible Puzzle was coined by Martin Gardner. [3] The puzzle is solvable, though not easily.

  6. Summation by parts - Wikipedia

    en.wikipedia.org/wiki/Summation_by_parts

    Summation by parts. In mathematics, summation by parts transforms the summation of products of sequences into other summations, often simplifying the computation or (especially) estimation of certain types of sums. It is also called Abel's lemma or Abel transformation, named after Niels Henrik Abel who introduced it in 1826.

  7. Vieta's formulas - Wikipedia

    en.wikipedia.org/wiki/Vieta's_formulas

    Vieta's formulas relate the polynomial coefficients to signed sums of products of the roots r1, r2, ..., rn as follows: Vieta's formulas can equivalently be written as for k = 1, 2, ..., n (the indices ik are sorted in increasing order to ensure each product of k roots is used exactly once). The left-hand sides of Vieta's formulas are the ...

  8. Highbrow - Wikipedia

    en.wikipedia.org/wiki/Highbrow

    Highbrow. Used colloquially as a noun or adjective, " highbrow " is synonymous with intellectual; as an adjective, it also means elite, and generally carries a connotation of high culture. The term, first recorded in 1875, draws its metonymy from the pseudoscience of phrenology, which teaches that people with large foreheads are more ...

  9. Elon Musk is staking Tesla’s very future on his Oct. 10 ...

    www.aol.com/finance/elon-musk-staking-tesla-very...

    When Elon Musk unveils Tesla’s robotaxi concept car on Oct. 10 in Los Angeles, it will be the first new product reveal since his prototype Optimus robot two years ago.