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  2. Combinatory logic - Wikipedia

    en.wikipedia.org/wiki/Combinatory_logic

    ((K x) y) = x. for all terms x and y. Or, following the convention for multiple application, (K x y) = x. A third combinator is S, which is a generalized version of application: (S x y z) = (x z (y z)) S applies x to y after first substituting z into each of them. Or put another way, x is applied to y inside the environment z.

  3. Mathematical model - Wikipedia

    en.wikipedia.org/wiki/Mathematical_model

    It can also be taught as a subject in its own right. [2] The use of mathematical models to solve problems in business or military operations is a large part of the field of operations research. Mathematical models are also used in music, [3] linguistics, [4] and philosophy (for example, intensively in analytic philosophy). A model may help to ...

  4. Wason selection task - Wikipedia

    en.wikipedia.org/wiki/Wason_selection_task

    [1] [2] [3] It is one of the most famous tasks in the study of deductive reasoning. [4] An example of the puzzle is: You are shown a set of four cards placed on a table, each of which has a number on one side and a color on the other. The visible faces of the cards show 3, 8, blue and red.

  5. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    [6] [7] [a] The parentheses can be omitted if the input is a single numerical variable or constant, [2] as in the case of sin x = sin(x) and sin π = sin(π). [a] Traditionally this convention extends to monomials; thus, sin 3x = sin(3x) and even sin ⁠ 1 / 2 ⁠ xy = sin(xy/2), but sin x + y = sin(x) + y, because x + y is not a monomial ...

  6. Fractional calculus - Wikipedia

    en.wikipedia.org/wiki/Fractional_calculus

    Fractional calculus was introduced in one of Niels Henrik Abel's early papers [4] where all the elements can be found: the idea of fractional-order integration and differentiation, the mutually inverse relationship between them, the understanding that fractional-order differentiation and integration can be considered as the same generalized ...

  7. Simplification - Wikipedia

    en.wikipedia.org/wiki/Simplification

    Simplification is the process of replacing a mathematical expression by an equivalent one that is simpler (usually shorter), according to a well-founded ordering. Examples include:

  8. Intercept theorem - Wikipedia

    en.wikipedia.org/wiki/Intercept_theorem

    The intercept theorem, also known as Thales's theorem, basic proportionality theorem or side splitter theorem, is an important theorem in elementary geometry about the ratios of various line segments that are created if two rays with a common starting point are intercepted by a pair of parallels.

  9. Abstraction (mathematics) - Wikipedia

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

    [6] In mathematics, abstraction can be advantageous in the following ways: It reveals deep connections between different areas of mathematics. Known results in one area can suggest conjectures in another related area. Techniques and methods from one area can be applied to prove results in other related areas.