I'm sure there's a reason for it, but why are there gaps in

z = (1/2)ln(e^x-e^-y)/(e^-y-e^-x))

? More to the point, is there a way to massage them away?

[GC 3.5 for Mac OS X under 10.3.8].

Thanks,
David Craig

PS. May I just repeat how thrilled I am to have this marvelous tool
back in my life [:-)]


<http://www.panix.com/~dac/>