DSolve and K$31, i am puzzled

*To*: mathgroup at smc.vnet.net*Subject*: [mg57078] DSolve and K$31, i am puzzled*From*: David Boily <dsboily at fastmail.ca>*Date*: Sat, 14 May 2005 04:58:23 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

When i try to solve this differential equation with the command: In[1]:= DSolve[f'[t] == Sign[p2 Exp[F2 t] - p1 Exp[F1 t] + p], f[t], t] where p, p1, p2, F1 and F2 are constants i get the answer F1 t F2 t (p - E p1 + E p2) (-K$31 + t) Out[1]= {{f[t] -> ------------------------------------- + C[1]}} F1 t F2 t 2 Sqrt[(p - E p1 + E p2) ] what the hell is K$31? I have tried to find out with google or the mathematica 5 online docs but have found nothing. can someone enlighten me? David Boily Centre for Intelligent Machines McGill University Montreal, Quebec

**Follow-Ups**:**Re: DSolve and K$31, i am puzzled***From:*Chris Chiasson <chris.chiasson@gmail.com>

**Re: DSolve and K$31, i am puzzled***From:*Igor Antonio <igora@wolf-ram.com>