Change of function in an ODE
- To: mathgroup at smc.vnet.net
- Subject: [mg109043] Change of function in an ODE
- From: Sam Takoy <sam.takoy at yahoo.com>
- Date: Sun, 11 Apr 2010 04:32:53 -0400 (EDT)
Hi,
I'm solving
DSolve[r^4 R''''[r] + 2 r^3 R'''[r] - r^2 R''[r] + r R'[r] -
L^4 r^4 R[r] == 0, R[r], r] // Simplify
Now, I would like to make the substitution R[r]=r^2 Log[r] G[r],
formulate the equation for G[r] and solve it. What's the proper syntax
for that?
Thanks,
Sam