Euler's formula

Euler's formula
a) Formula which links complex exponentiation with trigonometric functions:
b) Formula which calculates the normal curvature of an arbitrary direction in the tangent plane in terms of the principal curvatures and and the angle which that direction makes with the first principal direction:

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  • Euler's formula — 1. Math. the theorem that ei x = cos(x) + i sin(x). 2. Mech. a formula for determining the maximum load that can be applied to a given column without causing it to buckle. [1945 50; named after L. EULER] * * * Either of two important mathematical …   Universalium

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  • Proof of the Euler product formula for the Riemann zeta function — We will prove that the following formula holds::egin{align} zeta(s) = 1+frac{1}{2^s}+frac{1}{3^s}+frac{1}{4^s}+frac{1}{5^s}+ cdots = prod {p} frac{1}{1 p^{ s end{align}where zeta; denotes the Riemann zeta function and the product extends over… …   Wikipedia

  • Fórmula de Euler-Maclaurin — En matemáticas, la fórmula de Euler Maclaurin relaciona a integrales con series. Esta fórmula puede ser usada para aproximar integrales por sumas finitas o, de forma inversa, para evaluar series (finitas o infnitas) resolviendo integrales. La… …   Wikipedia Español

  • Fórmula de Euler — La fórmula o relación de Euler, atribuida a Leonhard Euler, establece que: para todo número real x. Aquí, e es la base del logaritmo natural, i es la unidad imaginaria, sin x y cos x son funciones trigonométricas. O bien: siendo z la… …   Wikipedia Español

  • Euler's identity — [ 300px|thumb|right|The exponential function e z can be defined as the limit of nowrap|(1 + z / N ) N , as N approaches infinity, and thus e iπ is the limit of nowrap|(1 + iπ/N ) N . In this animation N takes various increasing values from 1 to… …   Wikipedia

  • Euler's continued fraction formula — In the analytic theory of continued fractions, Euler s continued fraction formula is an identity connecting a certain very general infinite series with an infinite continued fraction. First published in 1748, it was at first regarded as a simple… …   Wikipedia

  • Euler characteristic — In mathematics, and more specifically in algebraic topology and polyhedral combinatorics, the Euler characteristic is a topological invariant, a number that describes one aspect of a topological space s shape or structure. It is commonly denoted… …   Wikipedia

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