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  2. Cross section (geometry) - Wikipedia

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

    For instance, while all the cross-sections of a ball are disks, [2] the cross-sections of a cube depend on how the cutting plane is related to the cube. If the cutting plane is perpendicular to a line joining the centers of two opposite faces of the cube, the cross-section will be a square, however, if the cutting plane is perpendicular to a ...

  3. Cavalieri's principle - Wikipedia

    en.wikipedia.org/wiki/Cavalieri's_principle

    This file represents the Cavalieri's Principle in action: if you have the same set of cross sections that only differ by a horizontal translation, you will get the same volume. In geometry , Cavalieri's principle , a modern implementation of the method of indivisibles , named after Bonaventura Cavalieri , is as follows: [ 1 ]

  4. Section (fiber bundle) - Wikipedia

    en.wikipedia.org/wiki/Section_(fiber_bundle)

    In the mathematical field of topology, a section (or cross section) [1] of a fiber bundle is a continuous right inverse of the projection function. In other words, if E {\displaystyle E} is a fiber bundle over a base space , B {\displaystyle B} :

  5. Elementary algebra - Wikipedia

    en.wikipedia.org/wiki/Elementary_algebra

    In programming languages such as Ada, [20] Fortran, [21] Perl, [22] Python [23] and Ruby, [24] a double asterisk is used, so is written as "x**2". Many programming languages and calculators use a single asterisk to represent the multiplication symbol, [ 25 ] and it must be explicitly used, for example, 3 x {\displaystyle 3x} is written "3*x".

  6. Cross section (physics) - Wikipedia

    en.wikipedia.org/wiki/Cross_section_(physics)

    The scattering of X-rays can also be described in terms of scattering cross sections, in which case the square ångström is a convenient unit: 1 Å 2 = 1020 m 2 = 10 000 pm 2 = 10 8 b. The sum of the scattering, photoelectric, and pair-production cross-sections (in barns) is charted as the "atomic attenuation coefficient" (narrow-beam), in ...

  7. Transversal (combinatorics) - Wikipedia

    en.wikipedia.org/wiki/Transversal_(combinatorics)

    [10] Another generalization of the concept of a transversal would be a set that just has a non-empty intersection with each member of C . An example of the latter would be a Bernstein set , which is defined as a set that has a non-empty intersection with each set of C , but contains no set of C , where C is the collection of all perfect sets of ...

  8. Dividing a circle into areas - Wikipedia

    en.wikipedia.org/wiki/Dividing_a_circle_into_areas

    The number of points (n), chords (c) and regions (r G) for first 6 terms of Moser's circle problem. In geometry, the problem of dividing a circle into areas by means of an inscribed polygon with n sides in such a way as to maximise the number of areas created by the edges and diagonals, sometimes called Moser's circle problem (named after Leo Moser), has a solution by an inductive method.

  9. Calculus - Wikipedia

    en.wikipedia.org/wiki/Calculus

    In mathematics education, calculus is an abbreviation of both infinitesimal calculus and integral calculus, which denotes courses of elementary mathematical analysis.. In Latin, the word calculus means “small pebble”, (the diminutive of calx, meaning "stone"), a meaning which still persists in medicine.