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  2. Differential form - Wikipedia

    en.wikipedia.org/wiki/Differential_form

    The form is pulled back to the submanifold, where the integral is defined using charts as before. For example, given a path γ(t) : [0, 1] → R 2, integrating a 1-form on the path is simply pulling back the form to a form f(t) dt on [0, 1], and this integral is the integral of the function f(t) on the interval.

  3. Closed and exact differential forms - Wikipedia

    en.wikipedia.org/wiki/Closed_and_exact...

    In mathematics, especially vector calculus and differential topology, a closed form is a differential form α whose exterior derivative is zero (dα = 0), and an exact form is a differential form, α, that is the exterior derivative of another differential form β. Thus, an exact form is in the image of d, and a closed form is in the kernel of d.

  4. Mathematical descriptions of the electromagnetic field

    en.wikipedia.org/wiki/Mathematical_descriptions...

    The source free equations can be written by the action of the exterior derivative on this 2-form. But for the equations with source terms (Gauss's law and the Ampère-Maxwell equation), the Hodge dual of this 2-form is needed. The Hodge star operator takes a p-form to a (n − p)-form, where n is the number of dimensions.

  5. Power of two - Wikipedia

    en.wikipedia.org/wiki/Power_of_two

    Visualization of powers of two from 1 to 1024 (2 0 to 2 10) as base-2 Dienes blocks. A power of two is a number of the form 2 n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent.

  6. Mersenne prime - Wikipedia

    en.wikipedia.org/wiki/Mersenne_prime

    In mathematics, a Mersenne prime is a prime number that is one less than a power of two.That is, it is a prime number of the form M n = 2 n − 1 for some integer n.They are named after Marin Mersenne, a French Minim friar, who studied them in the early 17th century.

  7. 2 - Wikipedia

    en.wikipedia.org/wiki/2

    2 Mathematics. Toggle Mathematics subsection. 2.1 Geometry. 2.2 Set theory. 3 Base 2. 4 List of basic calculations. ... (masculine, which survives today in the form ...

  8. E8 (mathematics) - Wikipedia

    en.wikipedia.org/wiki/E8_(mathematics)

    8 (2): it is of the form 2.G.2 (that is, a stem extension by the cyclic group of order 2 of an extension of the cyclic group of order 2 by a group G) where G is the unique simple group of order 174182400 (which can be described as PSΩ 8 + (2)). [3]

  9. Orthogonal group - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_group

    In mathematics, the orthogonal group in dimension n, ... More precisely, a rotation of angle θ is the product of two reflections whose axes form an angle of θ / 2.