Steffen's Polyhedron

Note: the same Greg Egan who wrote these https://www.amazon.de/s?k=greg+egan

I like the "Dark Integers" series of stories written by Greg Egan. They might even have inspired Liu Cixin to write in Death's End that somewhere deep in the universe, some powerful civilizations would weaponize physics laws, and some other even more powerful civilizations could even weaponize mathematics laws.