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arxiv: 1809.01595 · v2 · pith:CV5QEUWRnew · submitted 2018-09-05 · 🧮 math.SP · math.AP· math.DG

Tangent nodal sets for random spherical harmonics

classification 🧮 math.SP math.APmath.DG
keywords vectorfieldnodalrandomsphericaltangentasymptoticcoefficient
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In this note, we consider a fixed vector field $V$ on $S^2$ and study the distribution of points which lie on the nodal set (of a random spherical harmonic) where $V$ is also tangent. We show that the expected value of the corresponding counting function is asymptotic to the eigenvalue with a leading coefficient that is independent of the vector field $V$. This demonstrates, in some form, a universality for vector fields up to lower order terms.

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