Re: DSolve change in v5 -- undocumented error message
- To: mathgroup at smc.vnet.net
- Subject: [mg46768] Re: DSolve change in v5 -- undocumented error message
- From: Tom Burton <tburton at brahea.com>
- Date: Sun, 7 Mar 2004 01:33:46 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hello,
Version 5.0.0.0 on Max OSX gives me
Solve::ifun:
Inverse functions are being used by Solve
, so some solutions may not be found; use Reduce
for complete solution information. More\[Ellipsis]
Out[2]=
r t
E k n0
{{n[t] -> ----------------}}
r t
k - n0 + E n0
I verified the solution.
Tom Burton
On 3/4/04 9:05 PM, in article c298r9$56c$1 at smc.vnet.net, "Gareth Russell"
<gjr2008 at columbia.edu> wrote:
The following expression used to work in v4:
DSolve[{n'[t] == r*n[t]*(1 - n[t]/k), n[0] == n0}, n[t], t]
In v5, I get the message
"DSolve::bvfail: For some branches of the general solution, unable to
solve the conditions." ...