Greg Egan is definitely in the list of authors with the most radically hard scie...

Greg Egan is definitely in the list of authors with the most radically hard science fiction ideas, even more extravagant than those I found in Alfred Bester books.

Speaking of the Dust Theory, this looks very close to concept as Max Tegmark's Mathematical universe hypothesis: https://en.wikipedia.org/wiki/Mathematical_universe_hypothes...

Tegmark's book goes over it in a very readable way: https://www.amazon.de/Our-Mathematical-Universe-Ultimate-Rea...