kleing [Sun, 19 Feb 2006 13:21:32 +0100] rev 19106
* added Library/ASeries (sum of arithmetic series with instantiation to nat and int)
* added Complex/ex/ASeries_Complex (instantiation of the above for reals)
* added Complex/ex/HarmonicSeries (should really be in something like Complex/Library)
(these are contributions by Benjamin Porter, numbers 68 and 34 of
http://www.cs.ru.nl/~freek/100/)