It looks like your images aren't rendering for me. Could you just type out the math?
Aaron Meurer On Wed, Aug 14, 2013 at 6:40 AM, Boris Kheyfets <[email protected]>wrote: > Hello SymPy users and devs, > > I have a large expressions with > > - [image: $\log^2(\frac{R}{R_1})$] split into [image: $\log^2(R) - 2 > \log(R) \log(R_1) + \log^2 (R_1)$], and > - [image: $\log^3(\frac{R}{R_1})$] split into [image: $\left [ \log(R) > - \log(R_1)\right ]^3 = \ldots$] > > I want to combine logs (so to make it more readable). > > I think I need to factor the thing first, but factor fails and powsimpmakes > it even worse. > > Here's an image of the of the expression: > [image: $$\Gamma_{R}^{2} R^{4} R_{1}^{2} + 4 \Gamma_{R}^{2} R^{2} > R_{1}^{4} \log^{3}{\left (R \right )} - 12 \Gamma_{R}^{2} R^{2} R_{1}^{4} > \log^{2}{\left (R \right )} \log{\left (R_{1} \right )} - 8 \Gamma_{R}^{2} > R^{2} R_{1}^{4} \log^{2}{\left (R \right )} + 12 \Gamma_{R}^{2} R^{2} > R_{1}^{4} \log{\left (R \right )} \log^{2}{\left (R_{1} \right )} + 16 > \Gamma_{R}^{2} R^{2} R_{1}^{4} \log{\left (R \right )} \log{\left (R_{1} > \right )} + 2 \Gamma_{R}^{2} R^{2} R_{1}^{4} \log{\left (R \right )} - 4 > \Gamma_{R}^{2} R^{2} R_{1}^{4} \log^{3}{\left (R_{1} \right )} - 8 > \Gamma_{R}^{2} R^{2} R_{1}^{4} \log^{2}{\left (R_{1} \right )} - 2 > \Gamma_{R}^{2} R^{2} R_{1}^{4} \log{\left (R_{1} \right )} - \Gamma_{R}^{2} > R^{2} R_{1}^{4} - 2 \Gamma_{R}^{2} R_{1}^{6} \log^{2}{\left (R \right )} + > 4 \Gamma_{R}^{2} R_{1}^{6} \log{\left (R \right )} \log{\left (R_{1} \right > )} - 2 \Gamma_{R}^{2} R_{1}^{6} \log^{2}{\left (R_{1} \right )} + 4 > \Gamma_{R} P R^{4} R_{1}^{2} \log{\left (R \right )} - 4 \Gamma_{R} P R^{4} > R_{1}^{2} \log{\left (R_{1} \right )} + 2 \Gamma_{R} P R^{4} R_{1}^{2} - 8 > \Gamma_{R} P R^{2} R_{1}^{4} \log^{3}{\left (R \right )} + 24 \Gamma_{R} P > R^{2} R_{1}^{4} \log^{2}{\left (R \right )} \log{\left (R_{1} \right )} - 8 > \Gamma_{R} P R^{2} R_{1}^{4} \log^{2}{\left (R \right )} - 24 \Gamma_{R} P > R^{2} R_{1}^{4} \log{\left (R \right )} \log^{2}{\left (R_{1} \right )} + > 16 \Gamma_{R} P R^{2} R_{1}^{4} \log{\left (R \right )} \log{\left (R_{1} > \right )} + 8 \Gamma_{R} P R^{2} R_{1}^{4} \log^{3}{\left (R_{1} \right )} > - 8 \Gamma_{R} P R^{2} R_{1}^{4} \log^{2}{\left (R_{1} \right )} - 2 > \Gamma_{R} P R^{2} R_{1}^{4} + 4 \Gamma_{R} P R^{2} R_{1}^{2} > \log^{2}{\left (R \right )} - 8 \Gamma_{R} P R^{2} R_{1}^{2} \log{\left (R > \right )} \log{\left (R_{1} \right )} - 4 \Gamma_{R} P R^{2} R_{1}^{2} > \log{\left (R \right )} + 4 \Gamma_{R} P R^{2} R_{1}^{2} \log^{2}{\left > (R_{1} \right )} + 4 \Gamma_{R} P R^{2} R_{1}^{2} \log{\left (R_{1} \right > )} - 4 \Gamma_{R} P R_{1}^{4} \log{\left (R \right )} + 4 \Gamma_{R} P > R_{1}^{4} \log{\left (R_{1} \right )} + 8 P^{2} R^{4} R_{1}^{2} > \log^{2}{\left (R \right )} - 16 P^{2} R^{4} R_{1}^{2} \log{\left (R \right > )} \log{\left (R_{1} \right )} + 8 P^{2} R^{4} R_{1}^{2} \log^{2}{\left > (R_{1} \right )} + 2 P^{2} R^{4} R_{1}^{2} - 2 P^{2} R^{2} R_{1}^{4} - 8 > P^{2} R^{2} R_{1}^{2} \log^{2}{\left (R \right )} + 16 P^{2} R^{2} > R_{1}^{2} \log{\left (R \right )} \log{\left (R_{1} \right )} - 8 P^{2} > R^{2} R_{1}^{2} \log{\left (R \right )} - 8 P^{2} R^{2} R_{1}^{2} > \log^{2}{\left (R_{1} \right )} + 8 P^{2} R^{2} R_{1}^{2} \log{\left (R_{1} > \right )} + 2 P^{2} R^{2} - 2 P^{2} R_{1}^{2}$$] > > My question: is there a way to combine logs in this case? > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
