Hello, On Fri, Mar 7, 2014 at 3:29 AM, Avichal Dayal <[email protected]>wrote: > It would be great if you could look at my proposal (just an initial draft) > and give suggestions:- > https://github.com/sympy/sympy/wiki/GSoC-2014-Application-Avichal-Dayal-Series-Expansion
> Formal Power Series: What about Lambert series? > Currently series() returns something like 1 + x + x**2/2 + O(x**3) while > Mathematica and others are also capable of returning something like > summation(x**n/factorial(n), (n, 0, oo)). I'm little surpised. Can you provide an example of this from the Mathematica? > Basic class structure: <--FormalSeries--> Very unclear. That's all to say. > Representation of infinite series: ... I'm planning to represent it > using ordered term of (coeff, exponent) knows as “lazy evaluation” in > the literature. Probably, you should think about multivariable series too. > We will need a sequence object to represent sequences. This is already > implemented here: > https://github.com/goodok/sympy/tree/sequences/sympy/sequences. However > the code is old and does not play nice with current SymPy structure. I > plan to re-implement it based on a similar model. I don't think it's a good idea. We should have instead a basic container type (cf. tuple or list) for infinite sequence (take look on Stream class in the "fn" python package). Then, we can wrap it like Tuple or Dict. -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/20140314102414.GA10361%40darkstar.order.hcn-strela.ru. For more options, visit https://groups.google.com/d/optout.
