This open access book summarizes the research done and results obtained in the second funding
phase of the Priority Program 1648 Software for Exascale Computing (SPPEXA) of the German
Research Foundation (DFG) presented at the SPPEXA Symposium in Dresden during October 21-23
2019. In that respect it both represents a continuation of Vol. 113 in Springer's series
Lecture Notes in Computational Science and Engineering the corresponding report of SPPEXA's
first funding phase and provides an overview of SPPEXA's contributions towards exascale
computing in today's sumpercomputer technology. The individual chapters address one or more of
the research directions (1) computational algorithms (2) system software (3) application
software (4) data management and exploration (5) programming and (6) software tools. The
book has an interdisciplinary appeal: scholars from computational sub-fields in computer
science mathematics physics or engineering will find itof particular interest.
