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  2. List of open-source software for mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_open-source...

    3.2 GNU Scientific Library. 3.3 Octave. ... Download QR code; Print/export Download as PDF; Printable version; In other projects

  3. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    the fine-structure constant in physics [2] [3] the angle of attack of an aircraft; an alpha particle (He 2+) angular acceleration in physics [4] the linear thermal expansion coefficient; the thermal diffusivity [5] In organic chemistry the α-carbon is the backbone carbon next to the carbonyl carbon, most often for amino acids; right ascension ...

  4. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The apparent triangles formed from the figures are 13 units wide and 5 units tall, so it appears that the area should be S = ⁠ 13×5 / 2 ⁠ = 32.5 units. However, the blue triangle has a ratio of 5:2 (=2.5), while the red triangle has the ratio 8:3 (≈2.667), so the apparent combined hypotenuse in each figure is actually bent.

  5. Triple bar - Wikipedia

    en.wikipedia.org/wiki/Triple_bar

    The triple bar character in Unicode is code point U+2261 ≡ IDENTICAL TO (≡, ≡). [1] The closely related code point U+2262 ≢ NOT IDENTICAL TO (≢, ≢) is the same symbol with a slash through it, indicating the negation of its mathematical meaning.

  6. Parametrization (geometry) - Wikipedia

    en.wikipedia.org/wiki/Parametrization_(geometry)

    [2] Parametrization is a mathematical process consisting of expressing the state of a system , process or model as a function of some independent quantities called parameters . The state of the system is generally determined by a finite set of coordinates , and the parametrization thus consists of one function of several real variables for each ...

  7. Neighbourhood (mathematics) - Wikipedia

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

    The epsilon neighbourhood of a number on the real number line. In a metric space M = ( X , d ) , {\displaystyle M=(X,d),} a set V {\displaystyle V} is a neighbourhood of a point p {\displaystyle p} if there exists an open ball with center p {\displaystyle p} and radius r > 0 , {\displaystyle r>0,} such that B r ( p ) = B ( p ; r ) = { x ∈ X ...

  8. Portal:Mathematics - Wikipedia

    en.wikipedia.org/wiki/Portal:Mathematics

    The sum of degrees of all six vertices is 2 + 3 + 2 + 3 + 3 + 1 = 14, twice the number of edges. In graph theory , the handshaking lemma is the statement that, in every finite undirected graph , the number of vertices that touch an odd number of edges is even.

  9. Generator (mathematics) - Wikipedia

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

    The 5th roots of unity in the complex plane under multiplication form a group of order 5. Each non-identity element by itself is a generator for the whole group. In mathematics and physics, the term generator or generating set may refer to any of a number of related concepts.