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Copyright (C) 2000-2012 Philippe Troin <webmaster@fifi.org>.
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ERFC(x)
ERFC function returns the complementary error function, defined as 1 - erf(x). erfc(x) is calculated more accurately than 1 - erf(x) for arguments larger than about 0.5.
If @x is not numeric a #VALUE! error is returned.
ERFC(6) equals 2.15197367e-17.
ERF.