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  2. Genus (mathematics) - Wikipedia

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

    The non-orientable genus, demigenus, or Euler genus of a connected, non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − k , where k is the non-orientable genus.

  3. Lagrangian and Eulerian specification of the flow field

    en.wikipedia.org/wiki/Lagrangian_and_Eulerian...

    File:Lagrangian vs Eulerian [further explanation needed] Eulerian perspective of fluid velocity versus Lagrangian depiction of strain. In classical field theories , the Lagrangian specification of the flow field is a way of looking at fluid motion where the observer follows an individual fluid parcel as it moves through space and time.

  4. List of online dictionaries - Wikipedia

    en.wikipedia.org/wiki/List_of_online_dictionaries

    LexSite non-collaborative English-Russian dictionary with contextual phrases; Linguee collaborative dictionary and contextual sentences; Madura English-Sinhala Dictionary free English to Sinhala and vice versa; Multitran multilingual online dictionary centered on Russian, and provides an opportunity of adding own translation

  5. Conservation form - Wikipedia

    en.wikipedia.org/wiki/Conservation_form

    An example of a set of equations written in conservation form are the Euler equations of fluid flow: + = + (+) = + ((+)) = Each of these represents the conservation of mass , momentum and energy , respectively.

  6. File:Opera Omnia Euler.I.1..ocr.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Opera_Omnia_Euler.I.1...

    Original file (1,243 × 1,843 pixels, file size: 38.32 MB, MIME type: application/pdf, 748 pages) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  7. Set (mathematics) - Wikipedia

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

    A set of polygons in an Euler diagram This set equals the one depicted above since both have the very same elements.. In mathematics, a set is a collection of different [1] things; [2] [3] [4] these things are called elements or members of the set and are typically mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other ...

  8. Eisenstein integer - Wikipedia

    en.wikipedia.org/wiki/Eisenstein_integer

    The ring of Eisenstein integers forms a Euclidean domain whose norm N is given by the square modulus, as above: (+) = +.A division algorithm, applied to any dividend α and divisor β ≠ 0, gives a quotient κ and a remainder ρ smaller than the divisor, satisfying:

  9. Mechanica - Wikipedia

    en.wikipedia.org/wiki/Mechanica

    Euler's laws of motion expressed scientific laws of Galileo and Newton in terms of points in reference frames and coordinate systems making them useful for calculation when the statement of a problem or example is slightly changed from the original. [3] Newton–Euler equations express the dynamics of a rigid body. Euler has been credited with ...