Hello, I'm trying to factor a symbolic expression with Laplace transforms in it:
sage: var('s t') (s, t) sage: y = function('y', t) sage: lt = laplace(diff(y, t,t) - 3*diff(y, t) + 2*y , t, s) sage: lt s^2*laplace(y(t), t, s) - 3*s*laplace(y(t), t, s) - s*y(0) + 2*laplace(y(t), t, s) + 3*y(0) - D[0](y)(0) sage: lt.factor() [boom] It ultimately complains about "IndexError: tuple index out of range". I'd like to see something like laplace(y(t), t, s)*(s^2 - 3*s + 2) + 3*y(0) - D[0](y)(0) and to hopefully get solve() to solve for laplace(y(t), t, s). Is this possible? Dan -- --- Dan Drake ----- http://mathsci.kaist.ac.kr/~drake -------
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