{* *! version 1.0.2  30apr2009}{...}
    {cmd:smallestdouble()}
{p2colset 8 22 26 2}{...}
{p2col: Range:}a double-precision number close to 0{p_end}
{p2col: Description:}returns the smallest double-precision number greater
        than zero.  If {bind:0 < {it:d} < {cmd:smallestdouble()}}, then {it:d}
	does not have full double precision; these are called the denormalized
	numbers.  This function takes no arguments, but the parentheses must
	be included.{p_end}
{p2colreset}{...}
