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evalhf/constant

constants known to evalhf

Description

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The following constants are known to evalhf:

Pi

gamma

Catalan

true

false

FLT_RADIX

DBL_MANT_DIG

DBL_DIG

DBL_EPSILON

DBL_MIN_EXP

DBL_MIN

DBL_MIN_10_EXP

DBL_MAX_EXP

DBL_MAX

DBL_MAX_10_EXP

LNMAXFLOAT

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evalhf(Digits) returns the approximate number of digits of the hardware floating-point system in use, regardless of the actual setting of Digits. This constant takes into account the precision returned by the standard mathematical functions.

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Inside evalhf, true has the value 1.0 and false has the value 0.0.

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The following constants are taken from the ANSI-C definition of floating-point parameters of an IEEE-standard floating-point system.

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FLT_RADIX: The base (or radix) of the floating-point number system.

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DBL_MANT_DIG: The number of significant base digits.

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DBL_DIG: The (approximate) equivalent number of significant decimal digits.

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DBL_EPSILON: The smallest positive x such that 1.0+x1.0

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DBL_MIN_EXP: Minimum normalized exponent

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DBL_MIN: Minimum normalized positive number

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DBL_MIN_10_EXP: Minimum exponent of a representable power of 10

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DBL_MAX_EXP: Maximum exponent

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DBL_MAX: Maximum number

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DBL_MAX_10_EXP: Maximum exponent of a representable power of 10

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LNMAXFLOAT: A number slightly smaller than the largest number x such that evalhf(exp(x)) and evalhf(exp(-x)) both successfully compute, and such that the results of those computations can continue to be used in evalhf.  On most machines, this value is set as evalhf(-ln(DBL_MIN)) truncated to 6 decimal places.

See Also

Maple_floats

 


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