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  2. Calculus of variations - Wikipedia

    en.wikipedia.org/wiki/Calculus_of_Variations

    The calculus of variations may be said to begin with Newton's minimal resistance problem in 1687, followed by the brachistochrone curve problem raised by Johann Bernoulli (1696). [2] It immediately occupied the attention of Jacob Bernoulli and the Marquis de l'Hôpital , but Leonhard Euler first elaborated the subject, beginning in 1733.

  3. Variational principle - Wikipedia

    en.wikipedia.org/wiki/Variational_principle

    For example, the problem of determining the shape of a hanging chain suspended at both ends—a catenary—can be solved using variational calculus, and in this case, the variational principle is the following: The solution is a function that minimizes the gravitational potential energy of the chain.

  4. Cant (architecture) - Wikipedia

    en.wikipedia.org/wiki/Cant_(architecture)

    The Chiesa del Purgatorio, Ragusa: the facade are angled (canted) back from the centre. County Hall, Aylesbury with canted recesses. A cant in architecture is an angled (oblique-angled) line or surface that cuts off a corner. [1] [2] Something with a cant is canted. Canted façades are a typical of, but not exclusive to, Baroque architecture.

  5. Exterior calculus identities - Wikipedia

    en.wikipedia.org/wiki/Exterior_calculus_identities

    This article summarizes several identities in exterior calculus, a mathematical notation ... ( Hodge dual of constant function 1 is the volume form) Co-differential ...

  6. Glossary of calculus - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_calculus

    The intent is that when expressed in new variables, the problem may become simpler, or equivalent to a better understood problem. cofunction A function f is cofunction of a function g if f(A) = g(B) whenever A and B are complementary angles. [10] This definition typically applies to trigonometric functions.

  7. Sagitta (geometry) - Wikipedia

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

    When the sagitta is small in comparison to the radius, it may be approximated by the formula [2] s ≈ l 2 8 r . {\displaystyle s\approx {\frac {l^{2}}{8r}}.} Alternatively, if the sagitta is small and the sagitta, radius, and chord length are known, they may be used to estimate the arc length by the formula

  8. Regiomontanus' angle maximization problem - Wikipedia

    en.wikipedia.org/wiki/Regiomontanus'_angle...

    In mathematics, the Regiomontanus's angle maximization problem, is a famous optimization problem [1] posed by the 15th-century German mathematician Johannes Müller [2] (also known as Regiomontanus). The problem is as follows: The two dots at eye level are possible locations of the viewer's eye. A painting hangs from a wall.

  9. Tangent half-angle substitution - Wikipedia

    en.wikipedia.org/wiki/Tangent_half-angle...

    The tangent of half an angle is important in spherical trigonometry and was sometimes known in the 17th century as the half tangent or semi-tangent. [2] Leonhard Euler used it to evaluate the integral ∫ d x / ( a + b cos ⁡ x ) {\textstyle \int dx/(a+b\cos x)} in his 1768 integral calculus textbook , [ 3 ] and Adrien-Marie Legendre described ...

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