OAI/GroupTheory/PolycyclicRecognition/Algebra/PositiveZeroSums.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

The finite positive-sum obstruction to a character hemisphere

Carathéodory reduces the obstruction to at most dimension plus one characters. This is the precise convex step needed after a homological tameness estimate.

  1. theorem OAI.PolycyclicRecognition.zero_not_mem_convexHull_of_no_positive_sum line 17
  2. theorem OAI.PolycyclicRecognition.zero_not_mem_convexHull_of_no_small_positive_sum line 27