Fortran - Re: small numerical differences in floating point result between

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Re: small numerical differences in floating point result between

Victor Bazarov

2004-12-20, 3:59 pm

Merrill & Michele wrote:
> "JS" <someone@somewhere.com> wrote in message
> news:e8o1s0t43aemputvbudau75v4rbp0nn8sd@
4ax.com...
>
>
>
> Does the Standard have anything to say about machine epsilon? MPJ

Which Standard do you mean to ask about? You cross-posted to three
different language newsgroups. The C++ Standard says that the member
'epsilon' of 'std::numeric_limits' returns the difference between 1
and the least value greater than 1 that is representable. It does not
say specify the actual value returned from 'epsilon'. The C Standard
does give the maximum acceptable values of 'FLT_EPSILON', 'DBL_EPSILON'
and 'LDBL_EPSILON', but your implementation is free to provide its own,
smaller values. And I have no idea about the Fortran Standard.

V

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