Relative n-plectic structures are claimed to produce L-infinity algebras of observables, yielding Lie 2-algebras and homotopy moment maps for quasi-Hamiltonian G-spaces, though several sign and generality issues remain.
How Dennis realized he had `invented' $L_\infty$-algebras a.k.a. strongly homotopy Lie algebras
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This is my attempt to rediscover how Dennis realized that he had discovered/invented $L_\infty$-algebras a.k.a. strongly homotopy Lie algebras before my colleagues and I defined them.
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Observables of Relative Structures and Lie 2-algebras associated with Quasi-Hamiltonian $G$-spaces
Relative n-plectic structures are claimed to produce L-infinity algebras of observables, yielding Lie 2-algebras and homotopy moment maps for quasi-Hamiltonian G-spaces, though several sign and generality issues remain.