[ublas] Lastest version of Matrix exponential

From: Tsai Dung-Bang (dbtsai_at_[hidden])
Date: 2007-11-23 15:21:00

Dear all

Thanks to all the guys who have helped me for finishing this work.
Now, this library could automatically determine if the matrix is
complex or not.

Gunter Winkler, please review this version, thank you for your help.

-- 
Best Wishes,
Tsai, Dung-Bang   蔡東邦
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