OAI/Analysis/CircleDomains/Probability/FusionKernel.lean

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Removing all basis neighborhoods whose intersection with a closed candidate set is test-small leaves a closed nonsmall kernel. Every neighborhood of every remaining point meets the kernel nonsmally, as needed by the finite fusion split.

  1. theorem OAI.CircleDomainRigidity.exists_closed_hit_test_kernel line 21