Re: "teach" mathematica an integral

*To*: mathgroup at smc.vnet.net*Subject*: [mg54293] Re: "teach" mathematica an integral*From*: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>*Date*: Wed, 16 Feb 2005 14:36:14 -0500 (EST)*Organization*: Uni Leipzig*References*: <curp29$qvk$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, define: g /: Integrate[g[x_], x_] := q[x] and Integrate[g[z], z] gives q[z] since you hav not given the correct form fo the function you wish to integrate, I can only advice to use the most general form of te integration, i.e., instead of the definition above Unprotect[Integrate] Integrate[a_.*g[x_] + c_., x_] /; FreeQ[a, x] := a q[x] + c Protect[Integrate] Regards Jens "julia" <dbug at hotmail.de> schrieb im Newsbeitrag news:curp29$qvk$1 at smc.vnet.net... > Hi group, > > I've had an integral (a laplace-transformation) which mathematica doesn't > know. > Now i have an analytic expression for the integral. > Is there a possibility to add the new integral to mathematica (for example > in any kind of library)? > My problem is, that this integral is only a part of a longer formula for > which i need the transformation... > > Thanks! > >