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1.1 ! root 1: .EQ ! 2: delim $$ ! 3: .EN ! 4: .TH ERF 3M ! 5: .CT 2 math ! 6: .SH NAME ! 7: erf, erfc \(mi error function ! 8: .SH SYNOPSIS ! 9: .B #include <math.h> ! 10: .PP ! 11: .B double erf(x) ! 12: .br ! 13: .B double x; ! 14: .PP ! 15: .B double erfc(x) ! 16: .br ! 17: .B double x; ! 18: .SH DESCRIPTION ! 19: These functions calculate the error function ! 20: .RI erf( x ) ! 21: .if n .ig ! 22: $=~2 pi sup -1/2 int from 0 to x roman e sup -t sup 2 dt$ ! 23: .. ! 24: and the complementary error function ! 25: .RI erfc( x ) ! 26: .if n .ig ! 27: $=~ 1 - erf( x )$ ! 28: .. ! 29: \&. ! 30: The error criterion for both ! 31: .I erf ! 32: and ! 33: .I erfc ! 34: is relative. ! 35: .SH DIAGNOSTICS ! 36: There are no error returns. ! 37: .EQ ! 38: delim off ! 39: .EN
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