Central invariants revisited
| Authors | |
|---|---|
| Publication date | 2018 |
| Journal | Journal de l'Ecole Polytechnique - Mathematiques |
| Volume | Issue number | 5 |
| Pages (from-to) | 149-175 |
| Organisations |
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| Abstract | We use refined spectral sequence arguments to calculate known and previously unknown bi-Hamiltonian cohomology groups, which govern the deformation theory of semisimple bi-Hamiltonian pencils of hydrodynamic type with one independent and N dependent variables. In particular, we rederive the result of Dubrovin-Liu-Zhang that these deformations are parametrized by the so-called central invariants, which are N smooth functions of one variable. |
| Document type | Article |
| Language | English |
| Published at | https://doi.org/10.5802/jep.66 |
| Other links | https://www.scopus.com/pages/publications/85049446382 |
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Central invariants revisited
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