Selected Topics in Numerical Methods for Cosmology
  The large amount of cosmological data already available (and in the near
future) makes necessary the development of efficient numerical codes. Many
software products have been implemented to perform cosmological analyses
considering one or few probes. The need of multi-task software is rapidly
increasing, in order to combine numerous cosmological probes along with their
specificity (e.g., astrophysical descriptions and systematic errors). In this
work we mention some of these libraries, bringing out some challenges they will
face in the few-percent error era (on the cosmological parameters). We review
some concepts of the standard cosmological model, and examine some specific
topics on their implementation, bringing, for example, the discussion on how
some quantities are numerically defined in different codes. We also consider
implementation differences between public codes, mentioning their
advantages/disadvantages.
