Pb with finding a residue

*To*: mathgroup at smc.vnet.net*Subject*: [mg14643] Pb with finding a residue*From*: lebigot at ens.fr (Eric Le Bigot)*Date*: Sat, 7 Nov 1998 02:09:56 -0500*Organization*: Ecole Normale Superieure, Paris*Sender*: owner-wri-mathgroup at wolfram.com

Hello, Mathematica fails to find a residue in some very simple cases, and I would be very glad if someone could tell me how Mathematica can find residues in such cases. The problem can be easily seen in the two following lines: \!\(Residue[1\/\(z\_12 - a\), {z\_12, a}]\) \!\(Residue[ 1\/\(z\_12 - \((\(I\ E\_n12\)\/\(-I\))\)\), {z\_12, \((\(I\ E\_n12\)\/\(-I\))\)}]\) The two cases are simple and only the first one is successfully computed by Mathematica. The problem is that I need a *general* procedure that would allow correct computation in any such simple cases. Any help would be appreciated... EOL -- ------------------------------------------------------------------------------- Eric-Olivier LE BIGOT (EOL) Laboratoire KASTLER-BROSSEL, Case 74

**Follow-Ups**:**Re: Pb with finding a residue***From:*Jurgen Tischer <jtischer@col2.telecom.com.co>