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  2. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    Any real number can be written in the form m × 10 ^ n in many ways: for example, 350 can be written as 3.5 × 10 2 or 35 × 10 1 or 350 × 10 0. In normalized scientific notation (called "standard form" in the United Kingdom), the exponent n is chosen so that the absolute value of m remains at least one but less than ten (1 ≤ | m | < 10).

  3. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    1.79 ± 0.06 (correct), 1.79 ± 0.96 (correct), 1.79 ± 1.96 (incorrect). The digit positions of the last significant figures in x best and σ x are the same, otherwise the consistency is lost. For example, "1.79 ± 0.067" is incorrect, as it does not make sense to have more accurate uncertainty than the best estimate.

  4. Decimal separator - Wikipedia

    en.wikipedia.org/wiki/Decimal_separator

    In 1958, disputes between European and American delegates over the correct representation of the decimal separator nearly stalled the development of the ALGOL computer programming language. [23] ALGOL ended up allowing different decimal separators, but most computer languages and standard data formats (e.g., C , Java , Fortran , Cascading Style ...

  5. Numerical digit - Wikipedia

    en.wikipedia.org/wiki/Numerical_digit

    The total value of the number is 1 ten, 0 ones, 3 tenths, and 4 hundredths. The zero, which contributes no value to the number, indicates that the 1 is in the tens place rather than the ones place. The place value of any given digit in a numeral can be given by a simple calculation, which in itself is a complement to the logic behind numeral ...

  6. Numeric character reference - Wikipedia

    en.wikipedia.org/wiki/Numeric_character_reference

    For example, as mentioned above, the correct numeric character reference for the Euro sign "€" U+20AC when using Unicode is decimal &#8364; and hexadecimal &#x20AC;. However, if using tools supporting obsolete implementations of HTML, the reference &#128; (Euro sign in the CP-1252 code page) or &#164; (Euro sign in ISO/IEC 8859-15) may work.

  7. Mathematical notation - Wikipedia

    en.wikipedia.org/wiki/Mathematical_notation

    For example, the physicist Albert Einstein's formula = is the quantitative representation in mathematical notation of mass–energy equivalence. [ 1 ] Mathematical notation was first introduced by François Viète at the end of the 16th century and largely expanded during the 17th and 18th centuries by René Descartes , Isaac Newton , Gottfried ...

  8. Absolute value - Wikipedia

    en.wikipedia.org/wiki/Absolute_value

    The real and complex absolute values defined above are examples of absolute values for an arbitrary field. If v is an absolute value on F , then the function d on F × F , defined by d ( a , b ) = v ( a − b ) , is a metric and the following are equivalent:

  9. Alphabetic numeral system - Wikipedia

    en.wikipedia.org/wiki/Alphabetic_numeral_system

    The first examples of the Greek system date back to the 6th century BC, written with the letters of the archaic Greek script used in Ionia. [2] Other cultures in contact with Greece adopted this numerical notation, replacing the Greek letters with their own script; these included the Hebrews in the late 2nd century BC.