home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.math.symbolic
- Path: sparky!uunet!pipex!warwick!bham!ibm3090.bham.ac.uk!PEARCES
- From: PEARCES@IBM3090.BHAM.AC.UK
- Subject: (None set)
- Sender: usenet@rs6000.bham.ac.uk (USENET News Service)
- Message-ID: <921019121000@ibm3090.bham.ac.uk>
- Date: Thu, 19 Nov 1992 12:10:00 GMT
- Organization: The University of Birmingham, United Kingdom
- Lines: 31
-
- First of all may I express my utmost thanks to Kate et al.
- Unfortunately the above does not help me with my problem that much.
- Therefore I will try to explain it more fully.
- Sadly this will mean using terms and concepts with which I am still
- as yet not fully comfortable.
-
- Firstly my original expression contains square roots.
- These are multi-valued and hence we have 2 Rieman sheets for the
- rooted parts of the expression.
- Since there are 2 of these does this mean that the expression without
- the ^2 has 4 Rieman sheets and after squaring this expression
- has 2?
- I have worked out by hand that the `spurious' roots quoted above
- correspond to the expression when we choose the negative root
- for one of the square roots and the positive for the other.
- This would mean that the `spurious' roots are on a different Rieman
- sheet to that normally evaluated by MAPLE.
- It is this situation I am most interested in since it has physical
- significance in the problem I am tackling.
-
- So the question in a nut shell is how to change the original expression
- so that it corresponds to the `spurious' roots and then eliminate the
- zero to find the remaining function (or just its value at the zero
- if this is not possible).
- Since this is to form part of a problem solving system
- I need a routine to do this automatically.
- Any further help would be greatly appreciated.
- Yours Gratefully,
- Stephen Pearce.
- P.S. I am using MAPLE 4.2 on an IBM3090 and so did not fully understand
- the MAPLE V syntax in the last message.
-