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Laplace of the difference of another variable in sage

Why did the diff(y.laplace(t,s),x) come out to be D0(y(x, t), t, s)*D0(x, t)? Could someone help me?

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updated 12 years ago

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Laplace of the difference of another variable in sage

Why did the diff(y.laplace(t,s),x) come out to be D0(y(x, D[0](laplace)(y(x, t), t, s)*D0(x, t)? s)*D[0](y)(x, t)? Could someone help me?

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Laplace of the difference differential of another variable in sage

Why did the diff(y.laplace(t,s),x) come out to be D[0](laplace)(y(x, t), t, s)*D[0](y)(x, t)? Could someone help me?