Cylinder conjecture for connected choice in dimension two
Let \rm\sffamily CC denote connected choice for non-empty connected closed subsets of . For a multi-valued operation , write for the product with the identity operation, and write for strong Weihrauch reducibility. An operation is a cylinder when . Cylinder conjecture. Connected choice in dimension two is not a cylinder:
The paper proves that connected choice in dimension one is not a cylinder and notes that dimensions at least three are cylinders via their equivalence with closed choice on the unit interval. Thus dimension two is the only unresolved case.
References
Primary source
Vasco Brattka, Stéphane Le Roux, Joseph S. Miller and Arno Pauly, “Connected Choice and the Brouwer Fixed Point Theorem”, arXiv:1206.4809 (2018).
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