Working Note 20 have been uploaded

Working Note 19 have been uploaded:

• WN20 – Parallelization of the solve phase in a task-based Cholesky solver using a sequential task flow model, Sébastien Cayrols, Iain Duff and Florent Lopez

The full list of published Working Notes can be found on this page: http://www.nlafet.eu/working-notes/