nag_machine_precision (X02AJC) is a constant defined in the C Header file.
nag_machine_precision (X02AJC) returns
machine precision, computed as
, where
is the arithmetic base (see
nag_real_base (X02BHC)) and
is the number of significant base-
digits (see
nag_real_base_digits (X02BJC)).
It is important to note that the definition of
here differs from that in
ISO (1997).
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