GSoC 2020 - Week 11

Key highlights of this week’s work are:

• Implemented Raabe’s Test

  • This was a long pending issue. Raabe's Test helps to determine the convergence of a series. It has been added to the concrete module to handle those cases when the ratio test becomes inconclusive.
    
    

• Fixed limit evaluations related to lowergamma, uppergamma and besselk function

  • We added _eval_is_meromorphic method to class lowergamma and uppergamma so that some of the limits involving lowergamma and uppergamma functions get evaluated using the meromorphic check already present in the limit codebase. Now, to make lowergamma and uppergamma functions tractable for limit evaluations, _eval_aseries method was added to lowergamma and _eval_rewrite_as_tractable to uppergamma.

    Finally, we also rectified the eval method of class besselk, so that besselk(nu, oo) automatically evaluates to 0.