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Euler's identity therefore states that the limit, as n approaches infinity, of (+) is equal to −1. This limit is illustrated in the animation to the right. Euler's formula for a general angle. Euler's identity is a special case of Euler's formula, which states that for any real number x,
Euler's formula is ubiquitous in mathematics, physics, chemistry, and engineering. The physicist Richard Feynman called the equation "our jewel" and "the most remarkable formula in mathematics". [2] When x = π, Euler's formula may be rewritten as e iπ + 1 = 0 or e iπ = −1, which is known as Euler's identity.
Euler's identity is a special case of this: + =. This identity is particularly remarkable as it involves e, , i, 1, and 0, arguably the five most important constants in mathematics, as well as the four fundamental arithmetic operators: addition, multiplication, exponentiation, and equality.
However, the coefficient of x 12 is −1 because there are seven ways to partition 12 into an even number of distinct parts, but there are eight ways to partition 12 into an odd number of distinct parts, and 7 − 8 = −1. This interpretation leads to a proof of the identity by canceling pairs of matched terms (involution method). [1]
This mathematical term forms part of an identity, a special case of Euler's formula, written = + (). Setting x {\displaystyle x} to a value of π {\displaystyle \pi } , as with the above term, Euler's formula reduces to a famous equation relating seven important mathematical symbols (and none that are unimportant!), namely e i π + 1 ...
The Euler characteristic χ was classically defined for the surfaces of polyhedra, according to the formula χ = V − E + F {\displaystyle \chi =V-E+F} where V , E , and F are respectively the numbers of v ertices (corners), e dges and f aces in the given polyhedron.