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  2. Four color theorem - Wikipedia

    en.wikipedia.org/wiki/Four_color_theorem

    A four-colored map of the states of the United States (ignoring lakes and oceans) In mathematics, the four color theorem, or the four color map theorem, states that no more than four colors are required to color the regions of any map so that no two adjacent regions have the same color. Adjacent means that two regions share a common boundary of ...

  3. Tessellation - Wikipedia

    en.wikipedia.org/wiki/Tessellation

    A tessellation or tiling is the covering of a surface, often a plane, using one or more geometric shapes, called tiles, with no overlaps and no gaps. In mathematics, tessellation can be generalized to higher dimensions and a variety of geometries. A periodic tiling has a repeating pattern. Some special kinds include regular tilings with regular ...

  4. Color theory - Wikipedia

    en.wikipedia.org/wiki/Color_theory

    Color theory, or more specifically traditional color theory, is the historical body of knowledge describing the behavior of colors, namely in color mixing, color contrast effects, color harmony, color schemes and color symbolism. [ 1] Modern color theory is generally referred to as Color science. While there is no clear distinction in scope ...

  5. History of mathematics - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematics

    The history of mathematics deals with the origin of discoveries in mathematics and the mathematical methods and notation of the past. Before the modern age and the worldwide spread of knowledge, written examples of new mathematical developments have come to light only in a few locales. From 3000 BC the Mesopotamian states of Sumer, Akkad and ...

  6. Here's What the Black History Month Colors Are and What They Mean

    www.aol.com/heres-black-history-month-colors...

    Design by Yoora Kim. When you see posters and graphics related to Black History Month, chances are you'll see them designed with the same four colors: red, black, green, and gold. These colors are ...

  7. 4 - Wikipedia

    en.wikipedia.org/wiki/4

    Mathematics. Four is the smallest composite number, its proper divisors being 1 and 2. [ 4] Four is the sum and product of two with itself: , the only non-zero number such that , which also makes four the smallest and only even squared prime number and hence the first squared prime of the form , where is a prime.

  8. Cuisenaire rods - Wikipedia

    en.wikipedia.org/wiki/Cuisenaire_rods

    In 1961, Seton Pollock produced the Colour Factor system, [17] consisting of rods from lengths 1 to 12 cm. Based on the work of Cuisenaire and Gattegno, he had invented a unified system for logically assigning a color to any number. After white (1), the primary colors red, blue and yellow are assigned to the first three primes (2, 3 and 5).

  9. Jagannath - Wikipedia

    en.wikipedia.org/wiki/Jagannath

    Jagannatha ( Odia: ଜଗନ୍ନାଥ, romanized: Jagannātha, lit. 'Lord of the Universe'; formerly English: Juggernaut) is a deity worshipped in regional Hindu traditions in India as part of a triad along with his ( Krishna 's) brother Balabhadra, and sister, Subhadra. Jagannath, within Odia Hinduism, is the supreme god, Purushottama, [ 1 ...