Re: [sympy] Re: Series expansion of f(x,y)

2014-06-28 Thread Aaron Meurer
I thought the difficulty was with getting Order to represent multidimensional orders and do anything nontrivial with them. Aaron Meurer On Mon, Jun 23, 2014 at 3:05 PM, Vinzent Steinberg vinzent.steinb...@gmail.com wrote: On Monday, June 16, 2014 4:47:07 PM UTC-4, Klaus Santor wrote: The

[sympy] Re: Series expansion of f(x,y)

2014-06-23 Thread Vinzent Steinberg
On Monday, June 16, 2014 4:47:07 PM UTC-4, Klaus Santor wrote: The current method for two variable expansion is to make two one dimensional expansions after removing (via removeO()) the order term for the first expansion. This isn't entirely satisfactory since there is then no proper error

[sympy] Re: Series expansion of f(x,y)

2014-06-20 Thread Richard Fateman
I haven't tried your example, so I am guessing what you are doing. BUT... You could read about how other computer algebra systems deal with this problem. For example Maxima has two methods for multiple-variable series, recursive-by-variable or total-degree truncation. I think it is ok to