Limits RegistryPUBLIC RECORDLimits RegistryResearch Console →Compactness bound for static spherical perfect-fluid stars satisfying Buchdahl's assumptions.
The question, scope, and sources behind this Registry record.
Upper-bound 2GM/(Rc^2) for a regular static spherical isotropic fluid with nonincreasing density.
Current frontiers derived from accepted Claims.
Assertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
Limits Registry. LR-003506. Buchdahl compactness bound. 2026.