Pencils of Stäckel-type Novikov algebras yield centrally extended Dubrovin-Novikov operators that generate coupled and triangular cKdV and cHD soliton hierarchies.
and Dorfman I.Y.,Hamiltonian operators and algebraic structures related to them, Funct
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From pencils of Novikov algebras of St\"ackel type to soliton hierarchies
Pencils of Stäckel-type Novikov algebras yield centrally extended Dubrovin-Novikov operators that generate coupled and triangular cKdV and cHD soliton hierarchies.