The following definition is given in a paper by M. Berger:
Here, $(M,g)$ is a Riemannian manifold and $S^2(M)$ is the space of symmetric $2$-tensors on $M$. Is there a coordinate-free equivalent for this “triple product” in terms of usual operators?
2026-03-31 12:03:35.1774958615
Berger notation for a triple product of tensors
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