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  2. 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.

  3. e (mathematical constant) - Wikipedia

    en.wikipedia.org/wiki/E_(mathematical_constant)

    The number e is a mathematical constant approximately equal to 2.71828 that is the base of the natural logarithm and exponential function.It is sometimes called Euler's number, after the Swiss mathematician Leonhard Euler, though this can invite confusion with Euler numbers, or with Euler's constant, a different constant typically denoted .

  4. Category:Free mathematics software - Wikipedia

    en.wikipedia.org/wiki/Category:Free_mathematics...

    Free software portal; Mathematics portal; This category is for software for performing mathematical tasks which is distributed as free software — that is to say that the source code must be available and re-usable under a free software license

  5. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Communication technologies apply branches of mathematics that may be very old (e.g., arithmetic), especially with respect to transmission security, in cryptography and coding theory. Discrete mathematics is useful in many areas of computer science, such as complexity theory , information theory , and graph theory . [ 138 ]

  6. Richard Dedekind - Wikipedia

    en.wikipedia.org/wiki/Richard_Dedekind

    Julius Wilhelm Richard Dedekind (/ ˈ d eɪ d ɪ k ɪ n d /; [1] German: [ˈdeːdəˌkɪnt]; 6 October 1831 – 12 February 1916) was a German mathematician who made important contributions to number theory, abstract algebra (particularly ring theory), and the axiomatic foundations of arithmetic.

  7. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    In December 2020, the second edition of PDF 2.0, ISO 32000-2:2020, was published, with clarifications, corrections, and critical updates to normative references [16] (ISO 32000-2 does not include any proprietary technologies as normative references). [17] In April 2023 the PDF Association made ISO 32000-2 available for download free of charge. [15]

  8. Mathematics and the Imagination - Wikipedia

    en.wikipedia.org/wiki/Mathematics_and_the...

    Chapter 3 is "Pie (π, i, e) Transcendental and Imaginary". To motivate e (mathematical constant), they discuss first compound interest and then continuous compounding. "No other mathematical constant, not even π, is more closely connected with human affairs" (p 86). "[e] has played an integral part in helping mathematicians describe and ...

  9. Scalar (mathematics) - Wikipedia

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

    A scalar is an element of a field which is used to define a vector space.In linear algebra, real numbers or generally elements of a field are called scalars and relate to vectors in an associated vector space through the operation of scalar multiplication (defined in the vector space), in which a vector can be multiplied by a scalar in the defined way to produce another vector.