The Hopf-invariant formulas for fibered knots
The Hopf-invariant formulas for fibered knots
Let be a knot, let denote its genus, let denote its Hopf invariant, let denote the integer-valued exponent invariant in the leading term of , let denote its Alexander polynomial, and let denote its Habiro coefficients. Hopf-invariant formulas conjecture. The formulas
and
hold for all fibered knots. These formulas relate the leading behavior of to the Hopf invariant and to Habiro coefficients. The paper proves them for homogeneous braid knots and fibered knots of at most 12 crossings, leaving the assertion for all fibered knots open.
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Primary source
Paul Orland, Lara San Martín Suárez, Toby Saunders-A'Court and Josef Svoboda, “Quantum Invariants and Fiberedness”, arXiv:2512.23700 (2026).
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