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A solution of E101 riboflavin (also known as vitamin B2) Crystals of E621 monosodium glutamate (MSG), a flavour enhancer. E numbers, short for Europe numbers, are codes for substances used as food additives, including those found naturally in many foods, such as vitamin C, for use within the European Union (EU) [1]: 27 and European Free Trade Association (EFTA). [2]
The number e is a mathematical constant approximately equal to 2.71828 that is the base of the natural logarithm and exponential function.It is sometimes called Euler's number, after the Swiss mathematician Leonhard Euler, though this can invite confusion with Euler numbers, or with Euler's constant, a different constant typically denoted .
The mathematical constant e can be represented in a variety of ways as a real number.Since e is an irrational number (see proof that e is irrational), it cannot be represented as the quotient of two integers, but it can be represented as a continued fraction.
It has been shown that both e + π and π/e do not satisfy any polynomial equation of degree and integer coefficients of average size 10 9. [47] [48] At least one of the numbers e e and e e 2 is transcendental. [49] Schanuel's conjecture would imply that all of the above numbers are transcendental and algebraically independent. [50]
Any complex number = + can be represented by the point (,) on the complex plane. This point can also be represented in polar coordinates as ( r , θ ) {\displaystyle (r,\theta )} , where r is the absolute value of z (distance from the origin), and θ {\displaystyle \theta } is the argument of z (angle counterclockwise from the positive x -axis).
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]
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An E number is a food additive code. E number or E code may also refer to: e (mathematical constant), the base of the natural logarithm; 14 (number), the number represented by hexadecimal "E" International E-road network, a numbering system for roads in Europe