Conjectural trichotomy for bicontact structures supporting Anosov flows
Conjectural trichotomy for bicontact structures supporting Anosov flows
Let be a bicontact structure supporting an Anosov flow . The bicontact trichotomy conjecture. Exactly one of the following holds:
- is Anosov contact, it admits a Reeb Anosov flow contained in , and is a positively skew Anosov flow isotopically equivalent to ;
- is Anosov contact, it admits a Reeb Anosov flow contained in , and is a negatively skew Anosov flow isotopically equivalent to ;
- neither nor is Anosov contact, and either is a suspension Anosov flow or is not -covered.
This conjecture refines the relationship between Anosov contact structures and skew Anosov flows by specifying where an isotopically equivalent Reeb Anosov flow should occur. Proving it would require removing the bitransversality hypothesis from the cited theorem on bitransverse bicontact structures.
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Sources & referencesView supporting material
Primary source
Thomas Barthelmé, “A Smörgåsbord of (bi)contact structures, Reeb flows and pseudo-Anosov flows”, arXiv:2502.07716 (2025).
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