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  2. Euler's identity - Wikipedia

    en.wikipedia.org/wiki/Euler's_identity

    Euler's identity. In mathematics, Euler's identity [note 1] (also known as Euler's equation) is the equality. is pi, the ratio of the circumference of a circle to its diameter. Euler's identity is named after the Swiss mathematician Leonhard Euler. It is a special case of Euler's formula when evaluated for .

  3. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    On scientific calculators, it is usually known as "SCI" display mode. In scientific notation, nonzero numbers are written in the form. or m times ten raised to the power of n, where n is an integer, and the coefficient m is a nonzero real number (usually between 1 and 10 in absolute value, and nearly always written as a terminating decimal ).

  4. Taxation in the Czech Republic - Wikipedia

    en.wikipedia.org/wiki/Taxation_in_the_Czech_Republic

    The tax on buildings is based on the area of land occupied. The Building and unit tax ranges from CZK 2 to CZK 10 per square meter and in some cases can increase by 0.75 CZK per square meter with every floor exceeding 1/3 of the building built up area. The levy on agricultural land is 0.75% of its value.

  5. List of United States Navy ratings - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States_Navy...

    E-1 to E-3 are divided into five general occupational fields (airman, constructionman, fireman, hospitalman, or seaman) based on their rate. For example, an AD (Aviation Machinest's Mate) E-3 would be referred to as an Airman, an E-2 as an Airman Apprentice, and E-1 as an Airman Recruit.

  6. Euler's formula - Wikipedia

    en.wikipedia.org/wiki/Euler's_formula

    Euler's formula e iφ = cos φ + i sin φ illustrated in the complex plane. Interpretation of the formula. This formula can be interpreted as saying that the function e iφ is a unit complex number, i.e., it traces out the unit circle in the complex plane as φ ranges through the real numbers.

  7. Power of two - Wikipedia

    en.wikipedia.org/wiki/Power_of_two

    A power of two is a number of the form 2n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent . Powers of two with non-negative exponents are integers: 20 = 1, 21 = 2, and 2n is two multiplied by itself n times. [1] [2] The first ten powers of 2 for non-negative values of n are:

  8. Czech orthography - Wikipedia

    en.wikipedia.org/wiki/Czech_orthography

    Czech orthography is a system of rules for proper formal writing ( orthography) in Czech. The earliest form of separate Latin script specifically designed to suit Czech was devised by Czech theologian and church reformist Jan Hus, the namesake of the Hussite movement, in one of his seminal works, De orthographia bohemica ( On Bohemian ...

  9. e (mathematical constant) - Wikipedia

    en.wikipedia.org/wiki/E_(mathematical_constant)

    The number e is a mathematical constant approximately equal to 2.71828 that can be characterized in many ways. It is the base of the natural logarithm function. It is the limit of ( 1 + 1 / n ) n {\displaystyle (1+1/n)^{n}} as n tends to infinity, an expression that arises in the computation of compound interest .