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math.SG2020
ECH embedding obstructions for rational surfaces
Julian Chaidez, Ben Wormleighton
Let be a smooth rational surface or a possibly singular toric surface with ample divisor . We show that a family of ECH-based, algebro-geometric invariants $c^{\text{alg…
math.AG2020
Algebraic capacities
Ben Wormleighton
We study invariants coming from certain optimisation problems for nef divisors on surfaces. These optimisation problems arise in work of the author and collaborators tying obstruct…