Double ramification cycles and integrable systems

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13. Kontsevich-Witten series with $\hbar$

Proposed by Xavier Blot:

Write down the Kontsevich-Witten series with

$\hbar$ . What is the geometric meaning of the new coefficients? For

$\epsilon=0$ , these come from double Hurwitz numbers. Conjecturally, some of them are of the form

$\lambda \cdot \lambda \cdot (\psi\text{-classes})$ .

Cite this as: AimPL: Double ramification cycles and integrable systems, available at http://aimpl.org/doubleramific.

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