# GSoC 2017: Week 5

We started working on implementation of parametric logarithmic derivative problem using Risch structure Theorem. First we implemented the function `basis_Q`

, which seems like we wouldn’t be needing no-more. While doing that it seemed like there was problem with the `.is_algebraic`

property, as it was returning `(pi**3).is_algebraic`

as True. This bug was fixed in the pull request #12924.

Also a few improvements to the integral module pull request #12925 was also merged.

I don’t have much to say for now, until I complete the parametric logarithmic derivate PR.