Re: Change multiplication operations into convolution

*To*: mathgroup at smc.vnet.net*Subject*: [mg73607] Re: [mg73587] Change multiplication operations into convolution*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Fri, 23 Feb 2007 04:27:52 -0500 (EST)*Reply-to*: hanlonr at cox.net

C1 F1[t] F2[t] + C2 F3[t] F4[t] F1[t] /. Times -> CircleTimes /. CircleTimes[a_?AtomQ, f__] :> a*CircleTimes[f] Bob Hanlon ---- "Zhao wrote: > > If I want to change the multiplication operations into convolution > operations in an arbitrary function such as > C1 F1[t] F2[t] + C2 F3[t] F4[t] F1[t], > where Fi(t) represents functions of t and Ci represents constant, into > C1 F1[t] * F2[t] + C2 F3[t] * F4[t] * F1[t], where "*" indicate > convolution. > > any good elegant way to do it? High appreciations! > > Liang