>[!abstract] >The Hilbert–Pólya conjecture is a spectral theory attempt at proving the [[Riemann hypothesis]]. It states that the non-trivial zeros of the Riemann zeta function correspond to eigenvalues of a self-adjoint operator. >[!related] >- **North** (upstream): — >- **West** (similar): — >- **East** (different): — >- **South** (downstream): —