Generic projection invariance of Euclidean distance degree for arbitrary varieties
Generic projection invariance of Euclidean distance degree for arbitrary varieties
Let be an affine variety, let be a generic linear subspace with , where , and let , with the orthogonal projection. Generic projection invariance conjecture. Fact~ holds for arbitrary varieties; equivalently, the generic Euclidean distance degrees satisfy
The stated fact is known when is an affine cone over a projective variety, but the authors are not aware of a proof for arbitrary varieties; establishing this would contribute fundamentally to the theory of Euclidean distance degrees.
Sources & referencesView supporting material
Primary source
Giovanni Luca Marchetti, Erin Connelly, Paul Breiding and Kathlén Kohn, “Critical Points of Degenerate Metrics on Algebraic Varieties: A Tale of Overparametrization”, arXiv:2512.21029 (2025).
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