Let $(M,g)$ be Riemannian manifold , $Ric=\{R_{ij}\}$ is the Ricci tensor.
Whether the rank of Ricci tensor is monotonic ? In fact ,I want to show it is increase (non-decreasing).
2026-03-25 06:06:44.1774418804
Monotonicity of rank of Ricci tensor under Ricci flow
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