L-l-l-l-l-legend. expand_log works like a charm, with a bit of tweaking. Thanks a bunch!
On Tuesday, 23 July 2013 13:01:50 UTC+10, Aaron Meurer wrote: > > Sorry, but some powers automatically denest: > > In [6]: print sqrt(x/2) > sqrt(2)*sqrt(x)/2 > > so it is impossible to pull them together. > > expand_log does what you want, though it also expands using the > additive rule. It's not too much more complicated to make it work with > a multiplication of powers instead of a single power, though, if you > insist on writing your own targeted simplification function. > > Aaron Meurer > > > On Mon, Jul 22, 2013 at 2:28 AM, Ben Lucato <ben.l...@gmail.com<javascript:>> > wrote: > > Say I have an expression like: > > > > y = sqrt(2) * sqrt(-x + 4)/2 > > > > and then we call powsimp(y), we get: > > > > sqrt(-2*x + 8)/2 > > > > is there a way to get > > > > sqrt((-x + 4) / 2), i.e. have the denominator of the fraction be checked > > too? I tried looking at the docs but there didn't seem to be a > > simplification for this. > > > > > > My reasoning is for writing logs: if I can collect everything inside a > log > > to have a power, then that power can be moved outside the log - in this > > case, log(y) would become: > > > > log((-x + 4) / 2) / 2 > > > > -- > > 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 sympy+un...@googlegroups.com <javascript:>. > > To post to this group, send email to sy...@googlegroups.com<javascript:>. > > > 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 sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
