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  2. Help:Cheatsheet - Wikipedia

    en.wikipedia.org/wiki/Help:Cheatsheet

    For a full list of editing commands, see Help:Wikitext; For including parser functions, variables and behavior switches, see Help:Magic words; For a guide to displaying mathematical equations and formulas, see Help:Displaying a formula; For a guide to editing, see Wikipedia:Contributing to Wikipedia

  3. Block Range Index - Wikipedia

    en.wikipedia.org/wiki/Block_Range_Index

    A Block Range Index or BRIN is a database indexing technique. They are intended to improve performance with extremely large [ i ] tables. BRIN indexes provide similar benefits to horizontal partitioning or sharding but without needing to explicitly declare partitions.

  4. Data structure alignment - Wikipedia

    en.wikipedia.org/wiki/Data_structure_alignment

    A block of data of size 2 (n+1) − 1 always has one sub-block of size 2 n aligned on 2 n bytes. This is how a dynamic allocator that has no knowledge of alignment, can be used to provide aligned buffers, at the price of a factor two in space loss.

  5. Functional block diagram - Wikipedia

    en.wikipedia.org/wiki/Functional_block_diagram

    A functional block diagram, in systems engineering and software engineering, is a block diagram that describes the functions and interrelationships of a system. The functional block diagram can picture: [1] functions of a system pictured by blocks; input and output elements of a block pictured with lines; the relationships between the functions ...

  6. Domain of a function - Wikipedia

    en.wikipedia.org/wiki/Domain_of_a_function

    A function f from X to Y. The set of points in the red oval X is the domain of f. Graph of the real-valued square root function, f(x) = √ x, whose domain consists of all nonnegative real numbers. In mathematics, the domain of a function is the set of inputs accepted by the function.

  7. Chess notation - Wikipedia

    en.wikipedia.org/wiki/Chess_notation

    Extended Position Description (EPD). Another format which gives the current positions of a board, with an extended set of structured attribute values using the ASCII character set. It is intended for data and command interchange among chess playing programs. It is also intended for the representation of portable opening library repositories. [16]

  8. Elementary function - Wikipedia

    en.wikipedia.org/wiki/Elementary_function

    In mathematics, an elementary function is a function of a single variable (typically real or complex) that is defined as taking sums, products, roots and compositions of finitely many polynomial, rational, trigonometric, hyperbolic, and exponential functions, and their inverses (e.g., arcsin, log, or x 1/n).

  9. Abstract index notation - Wikipedia

    en.wikipedia.org/wiki/Abstract_index_notation

    Abstract index notation (also referred to as slot-naming index notation) [1] is a mathematical notation for tensors and spinors that uses indices to indicate their types, rather than their components in a particular basis. [2] The indices are mere placeholders, not related to any basis and, in particular, are non-numerical.