On 18/05/2012 6:14 AM, mohan maruthi sena wrote:
Hi all,
I have used a user define potential to describe attractive potential beyond i and i+3 atoms(similar to lLJ). If i want to describe repulsive interactions with in i and i+3 , how can i do it in gromacs? can anyone suggest me a way,

You can have multiple user-defined potentials if you can set up energy groups within which they interact, but I don't think it is possible in the current code to have the potential vary with the bonded connectivity.

Mark
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