X-Nico

2 unusual facts about Yves Colin de Verdière


Colin de Verdière graph invariant

Colin de Verdière's invariant is a graph parameter \mu(G) for any graph G, introduced by Yves Colin de Verdière in 1990.

Quantum ergodicity

The quantum ergodicity theorem of Shnirelman, Yves Colin de Verdière, and Zelditch states that a compact Riemannian manifold whose unit tangent bundle is ergodic under the geodesic flow is also ergodic in the sense that the probability density associated to the nth eigenfunction of the Laplacian tends weakly to the uniform distribution on the unit cotangent bundle as n → ∞.



see also