Hi everyone,

is there a class of symbolic random variables X with methods like

E[X], Var[X] etc., as needed e.g. for analytically solving

Jacobi-Bellman-Equations (--> Dynamic Optimization).

Thanks for any hints.

Hendrik

1. change the combination of multiple symbolic variables into one symbolic variable

2. Symbolic change of variables in a symbolic expression

Given for instance the following expression

$ax_1+bx_2^(1/3)$,

does there exist a way to solve it, say, with respect to $x_1$ and $x_2/x_1$, that is, to make the change of variables $x_2=y*x_1$?

Thanks

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