Let us consider the closed convex cone of Sym (Sym be the subspaces of Lin constituted by all symmetric tensors)
K={A∈ Sym such that trA ≤ 0 }
For each E∈ Sym determine the projection P(E) of E onto K
2026-04-03 19:54:42.1775246082
Projection of tensor in vectorial space
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