1807 
""" 
""" 
1808 
Class to define a Lame equation problem: 
Class to define a Lame equation problem: 
1809 


1810 
M{grad(S{mu}*(grad(u[i])[j]+grad(u[j])[i]))[j]  grad(S{lambda}*grad(u[j])[i])[j] = F_i grad(S{sigma}[i,j])[j] } 
M{grad(S{mu}*(grad(u[i])[j]+grad(u[j])[i]))[j]  grad(S{lambda}*grad(u[k])[k])[j] = F_i grad(S{sigma}[ij])[j] } 
1811 


1812 
with natural boundary conditons: 
with natural boundary conditons: 
1813 


1814 
M{n[j]*(S{mu}*(grad(u[i])[j]+grad(u[j])[i])  S{lambda}*grad(u[j])[i]) = f_i n[j]*S{sigma}[i,j] } 
M{n[j]*(S{mu}*(grad(u[i])[j]+grad(u[j])[i]) + S{lambda}*grad(u[k])[k]) = f_i +n[j]*S{sigma}[ij] } 
1815 


1816 
and constraints: 
and constraints: 
1817 

