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  2. Dimension - Wikipedia

    en.wikipedia.org/wiki/Dimension

    The inductive dimension of a topological space may refer to the small inductive dimension or the large inductive dimension, and is based on the analogy that, in the case of metric spaces, (n + 1)-dimensional balls have n-dimensional boundaries, permitting an inductive definition based on the dimension of the boundaries of open sets. Moreover ...

  3. Dimensional analysis - Wikipedia

    en.wikipedia.org/wiki/Dimensional_analysis

    In engineering and science, dimensional analysis is the analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric current) and units of measurement (such as metres and grams) and tracking these dimensions as calculations or comparisons are performed.

  4. Five-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Five-dimensional_space

    A five-dimensional space is a space with five dimensions. In mathematics , a sequence of N numbers can represent a location in an N -dimensional space . If interpreted physically, that is one more than the usual three spatial dimensions and the fourth dimension of time used in relativistic physics .

  5. Four-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Four-dimensional_space

    Four-dimensional space (4D) is the mathematical extension of the concept of three-dimensional space (3D). Three-dimensional space is the simplest possible abstraction of the observation that one needs only three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world.

  6. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    Dimension symbol Quantity name Typical symbols Definition second: s time: The duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom. metre: m length

  7. Manifold - Wikipedia

    en.wikipedia.org/wiki/Manifold

    The dimension of the manifold at a certain point is the dimension of the Euclidean space that the charts at that point map to (number n in the definition). All points in a connected manifold have the same dimension.

  8. SI base unit - Wikipedia

    en.wikipedia.org/wiki/SI_base_unit

    The SI base units form a set of mutually independent dimensions as required by dimensional analysis commonly employed in science and technology. [citation needed] The names and symbols of SI base units are written in lowercase, except the symbols of those named after a person, which are written with an initial capital letter.

  9. List of dimensionless quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_dimensionless...

    Definition Field of application ... In dusty plasma physics, ... If is the dimensional frequency, then is the ...