Re: Analytical solution possible?

*To*: mathgroup at smc.vnet.net*Subject*: [mg131993] Re: Analytical solution possible?*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Tue, 12 Nov 2013 00:16:10 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-outx@smc.vnet.net*Delivered-to*: mathgroup-newsendx@smc.vnet.net*References*: <20131111050552.E7BBE6A24@smc.vnet.net>

I tried this in Mathematica 9.0.1 and DO get the expected message Solve::ifun : Inverse functions are being used by Solve. . . and, furthermore, obtain a rather long solution that is expressed in terms of some InverseFunction expressions. What version were you using? On Nov 11, 2013, at 12:05 AM, Narasimham <mathma18 at gmail.com> wrote: > NoISQL = {SI'[t] == (R[t] - a)/(2 a - R[t])/R[t]^2,R'[t] == Cot[SI[t]]/R[t]}; DSolve[NoISQL, {SI, R}, t] --- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower University of Massachusetts 710 North Pleasant Street Amherst, MA 01003-9305

**References**:**Analytical solution possible?***From:*Narasimham <mathma18@gmail.com>