vthierry

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Hi,
 i observe this error as if a sum() was used instead of a add() in dsolve

> assume(g > 0): dsolve({diff(r(t), t$2) + g * t * r(t), r(0) = r0, D(r)(0) = r1},  r(t));
Error, (in dsolve) unsupported type of index, _a

any help or advice, please ?

Sincerely.

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