[sympy] Student interested in contributing to this open source organization.

Hi, I am a CS undergrad from BITS-Pilani, Hyderabad. I recently came to know about open-source and I would like to start contibuting to sympy as maths is something I like. I know C, Java and Python. It would be great if someone tells me where to start. Thanks in advance, Dhananjay. -- You

[sympy] DyLabIPy, a min lecture about doing Math with Computation

Hi all, I'm preparing a new lecture for dynamical systems from math views. It owns the features: a) min Python resources used as possibly b) IPython notebook interfacs c) data Visualization integrated And thanks to Sympy to do much help to this lecture. for example, numerical schemes

[sympy] Summation and solve

Hi! I try to solve loglik with sympy. Here an example: from sympy import * sigma2 = symbols('sigma2', real=True, positive=True) alpha, beta =symbols('alpha beta', real=True) k, n = symbols('k n', integer=True) Xk = Indexed('X', k) Yk = Indexed('Y', k) loglik = -1/2 * log(2*pi*sigma2) -

[sympy] Re: Summation and solve

betahat = loglik.diff(beta).solve(beta) solve is a function, not a method. Sum doesn't (apparently) have a method to pull out terms that are independent of the summation symbol so you have to do that by hand: get beta on the outside of the Sum. Then solve for beta. The following is not