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  2. 2020 Indonesian census - Wikipedia

    en.wikipedia.org/wiki/2020_Indonesian_census

    The Statistics Indonesia in 2018 has released the official projection of Indonesia's population 2015–2045, [3] which are based on previous census in 2010 and the 2015 Indonesian population survey between censuses (SUPAS).

  3. Map algebra - Wikipedia

    en.wikipedia.org/wiki/Map_algebra

    Map algebra is an algebra for manipulating geographic data, primarily fields.Developed by Dr. Dana Tomlin and others in the late 1970s, it is a set of primitive operations in a geographic information system (GIS) which allows one or more raster layers ("maps") of similar dimensions to produce a new raster layer (map) using mathematical or other operations such as addition, subtraction etc.

  4. Gall–Peters projection - Wikipedia

    en.wikipedia.org/wiki/Gall–Peters_projection

    The Gall–Peters projection of the world map. The Gall–Peters projection is a rectangular, equal-area map projection.Like all equal-area projections, it distorts most shapes.

  5. Map projection - Wikipedia

    en.wikipedia.org/wiki/Map_projection

    A medieval depiction of the Ecumene (1482, Johannes Schnitzer, engraver), constructed after the coordinates in Ptolemy's Geography and using his second map projection. In cartography, a map projection is any of a broad set of transformations employed to represent the curved two-dimensional surface of a globe on a plane.

  6. Random projection - Wikipedia

    en.wikipedia.org/wiki/Random_projection

    The core idea behind random projection is given in the Johnson-Lindenstrauss lemma, [2] which states that if points in a vector space are of sufficiently high dimension, then they may be projected into a suitable lower-dimensional space in a way which approximately preserves pairwise distances between the points with high probability.

  7. Behrmann projection - Wikipedia

    en.wikipedia.org/wiki/Behrmann_projection

    Behrmann projection of the world The Behrmann cylindrical equal-area projection with Tissot's indicatrices of deformation. The Behrmann projection is a cylindrical equal-area map projection described by Walter Behrmann in 1910. [1]

  8. Paul Bernays - Wikipedia

    en.wikipedia.org/wiki/Paul_Bernays

    Bernays was born into a distinguished German-Jewish family of scholars and businessmen. His great-grandfather, Isaac ben Jacob Bernays, served as chief rabbi of Hamburg from 1821 to 1849.

  9. Reverse Polish notation - Wikipedia

    en.wikipedia.org/wiki/Reverse_Polish_notation

    Video: Keys pressed for calculating eight times six on a HP-32SII (employing RPN) from 1991. Reverse Polish notation (RPN), also known as reverse Ɓukasiewicz notation, Polish postfix notation or simply postfix notation, is a mathematical notation in which operators follow their operands, in contrast to prefix or Polish notation (PN), in which operators precede their operands.