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Annotation of 43BSDReno/lib/libm/common_source/sqrt.3, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1985 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)sqrt.3      6.2 (Berkeley) 5/12/86
        !             6: .\"
        !             7: .TH SQRT 3M  "May 12, 1986"
        !             8: .UC 6
        !             9: .ds up \fIulp\fR
        !            10: .SH NAME
        !            11: cbrt, sqrt \- cube root, square root
        !            12: .SH SYNOPSIS
        !            13: .nf
        !            14: .B #include <math.h>
        !            15: .PP
        !            16: .B double cbrt(x)
        !            17: .B double x;
        !            18: .PP
        !            19: .B double sqrt(x)
        !            20: .B double x;
        !            21: .fi
        !            22: .SH DESCRIPTION
        !            23: Cbrt(x) returns the cube root of x.
        !            24: .PP
        !            25: Sqrt(x) returns the square root of x.
        !            26: .SH DIAGNOSTICS
        !            27: On a VAX, sqrt(negative)
        !            28: returns the reserved operand and sets \fIerrno\fR to EDOM .
        !            29: .SH ERROR (due to Roundoff etc.)
        !            30: Cbrt is accurate to within 0.7 \*(ups.
        !            31: .br
        !            32: Sqrt on a VAX is accurate to within 0.501 \*(ups.
        !            33: .br
        !            34: Sqrt on a machine that conforms to IEEE 754 is correctly rounded
        !            35: in accordance with the rounding mode in force; the error is less than
        !            36: half an \*(up in the default mode (round\-to\-nearest).
        !            37: An \*(up is one \fIU\fRnit in the \fIL\fRast \fIP\fRlace carried.
        !            38: .SH SEE ALSO
        !            39: math(3M), infnan(3M)
        !            40: .SH AUTHOR
        !            41: W. Kahan

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