Convexity conjecture for the positive total Hofer norm

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Let (M,ω)(M,\omega) be the symplectic manifold under consideration and let f∈Ham⁡(M,ω)f\in \operatorname{Ham}(M,\omega). Define the positive total Hofer norm as the function assigning to each n∈Nn\in\mathbb{N} the coefficient ∥f∥n+\|f\|_n^+ of the polynomial ∥f∥T+=∑k≥0∥f∥k+tk\|f\|_T^+=\sum_{k\geq 0}\|f\|_k^+t^k. Convexity conjecture. For all g>0g>0,

∥f∥g+1+−∥f∥g+≤∥f∥g+−∥f∥g−1+.\|f\|_{g+1}^+-\|f\|_g^+\leq \|f\|_g^+-\|f\|_{g-1}^+.

The conjecture asserts a regularity property for the sequence of positive gg-areas and is presented as the principal conjecture concerning their behaviour. Its status is not determined by the supplied text.

References

Primary source

François Lalonde and Andrei Teleman, “The g-areas and the commutator length”, arXiv:1404.1004 (2014).

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