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  2. Rounding - Wikipedia

    en.wikipedia.org/wiki/Rounding

    As a general rule, rounding is idempotent; [2] i.e., once a number has been rounded, rounding it again to the same precision will not change its value. Rounding functions are also monotonic; i.e., rounding two numbers to the same absolute precision will not exchange their order (but may give the same value).

  3. Round-off error - Wikipedia

    en.wikipedia.org/wiki/Round-off_error

    Round-by-chop: The base-expansion of is truncated after the ()-th digit. This rounding rule is biased because it always moves the result toward zero. Round-to-nearest: () is set to the nearest floating-point number to . When there is a tie, the floating-point number whose last stored digit is even (also, the last digit, in binary form, is equal ...

  4. IEEE 754 - Wikipedia

    en.wikipedia.org/wiki/IEEE_754

    rounding rules: properties to be satisfied when rounding numbers during arithmetic and conversions; operations: arithmetic and other operations (such as trigonometric functions) on arithmetic formats; exception handling: indications of exceptional conditions (such as division by zero, overflow, etc.)

  5. Signpost sequence - Wikipedia

    en.wikipedia.org/wiki/Signpost_sequence

    In mathematics and apportionment theory, a signpost sequence is a sequence of real numbers, called signposts, used in defining generalized rounding rules.A signpost sequence defines a set of signposts that mark the boundaries between neighboring whole numbers: a real number less than the signpost is rounded down, while numbers greater than the signpost are rounded up.

  6. Interval arithmetic - Wikipedia

    en.wikipedia.org/wiki/Interval_arithmetic

    Rules for calculating with intervals and other subsets of the real numbers were published in a 1931 work by Rosalind Cicely Young. [9] Arithmetic work on range numbers to improve the reliability of digital systems was then published in a 1951 textbook on linear algebra by Paul S. Dwyer [ de ] ; [ 10 ] intervals were used to measure rounding ...

  7. Floating-point arithmetic - Wikipedia

    en.wikipedia.org/wiki/Floating-point_arithmetic

    It is used to round the 33-bit approximation to the nearest 24-bit number (there are specific rules for halfway values, which is not the case here). This bit, which is 1 in this example, is added to the integer formed by the leftmost 24 bits, yielding: 11001001 00001111 1101101 1 _ . {\displaystyle 11001001\ 00001111\ 1101101{\underline {1}}.}

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  9. IEEE 754-2008 revision - Wikipedia

    en.wikipedia.org/wiki/IEEE_754-2008_revision

    The particular sets known as basic formats are defined, and the encodings used for interchange of binary and decimal formats are explained. The binary interchange formats have the " half precision " (16-bit storage format) and " quad precision " (128-bit format) added, together with generalized formulae for some wider formats; the basic formats ...

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