| Author |
Comment/Response |
Serj
|
 01/24/09 05:01am
Hi
i'm having a problem to solve DE and build Plot
i don't understand how to set folowing operator
Sqrt[-Laplacian[]] U[x]
for example if U[x] = sin[k*x] this operator should give me
Sqrt[-(-k ^ 2)] * sin[k*x] => |k| * sin[k * x]
ie square root takes from coefficient of a function
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