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Function std.mathspecial.erf
Error function
The integral is
erf(x) = 2/ (π)
0, x exp( - t, 2) dt
The magnitude of x is limited to about 106.56 for IEEE 80-bit
arithmetic; 1 or -1 is returned outside this range.
Prototype
real erf( real x ) pure nothrow @nogc @safe;
Authors
Stephen L. Moshier (original C code). Conversion to D by Don Clugston