Hello Andrew,

Very clearly a bug.  Comes from a bug in the log function (well, the
more precise internal version that is used when computing powers) in
the range [1.00099009, 1.0009901) it seems, and probably some other
ranges.  I'll investigate.

Also, I'll likely answer at some point in the next couple of days to
your juxtaposition email.  Sorry for the delay.

Regards,
Bruno

On 6/18/14, aparsloe <[log in to unmask]> wrote:
> \fp_eval:n {  exp(1) - (1+1/1009)^{1009}  } -> 0.001346
> \fp_eval:n {  exp(1) - (1+1/1010)^{1010}  } -> 0.001613
> \fp_eval:n {  exp(1) - (1+1/1011)^{1011}  } -> 0.001343