This paper presents the first formal semantics for the downgrading capabilities in CHERI-C/C++, describing how capabilities lose permissions and bounds during execution, and providing a foundation for reasoning about temporal memory safety properties.
Mathematician Timothy Gowers warns readers to brace themselves before reading further, suggesting the content that follows will be particularly impactful or surprising for mathematicians.
The article examines why a previously derived mathematical identity only holds for x > 1 and y > 1, using Mathematica to plot the condition and showing that the identity's validity is restricted to that domain.