MultiSeries bug?

Posted: edgar 669

June 08 2007

I found this today, probably a bug in MultiSeries :- series

> # Maple 11
# MultiSeries problem

> restart; with(MultiSeries):

> a2 := log(sinh(log(sinh(-log(z)/2))))+log(z)/2+2*log(2);

> limit(a2/z,z=0);

> plot(a2/z,z=-0.2..0.2,-10..0);

> series(a2,z=0); # this is correct: -5 z -33/2 z^2 ...

> a3 := simplify(a2);

> series(a3,z=0); # but this should be the same!

> plot(a3/z,z=-0.2..0.2,-10..0);

> # so it seems a3 itself is OK, but the series is wrong

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