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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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Subject (listing for 'Define operator')
Author Date Posted
Define operator Serj 01/24/09 05:01am
Re: Define operator yehuda ben-s... 01/26/09 02:06am
Re: Define operator yehuda ben-s... 01/26/09 02:11am
Re: Re: Define operator Serj 01/28/09 02:49am
Re: Re: Define operator robert 05/26/11 2:24pm
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