OpenAI reports sharp nodal-length bounds on smooth surfaces

For each fixed smooth closed connected Riemannian surface, the nodal set of every nonzero real Laplace eigenfunction of eigenvalue λ>0 has length at most C√λ, with C depending on the surface.

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Understanding the problem

Read the background

For each fixed smooth closed connected Riemannian surface, the nodal set of every nonzero real Laplace eigenfunction of eigenvalue λ>0 has length at most C√λ, with C depending on the surface.

Why it matters

If correct, proves the missing upper half of Yau’s nodal-length conjecture for smooth closed surfaces.

What counts as progress

Is nodal length on every smooth closed surface bounded above by C√λ?

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