Non-existence results for λ-biharmonic Riemannian submersions from constant-curvature (n+1)-manifolds to n-manifolds, plus constructions when λ equals the critical value in negative curvature.
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2 Pith papers cite this work. Polarity classification is still indexing.
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Cotton gravity on static spacetimes produces a Cotton-φ-perfect fluid structure for the spatial factor, generalizing φ-SPFST with reduction conditions, level-set geometry, and rigidity under curvature assumptions.
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\lambda-biharmonic Riemannian submersions from manifolds with constant sectional curvature
Non-existence results for λ-biharmonic Riemannian submersions from constant-curvature (n+1)-manifolds to n-manifolds, plus constructions when λ equals the critical value in negative curvature.
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On the Geometry of Cotton Gravity
Cotton gravity on static spacetimes produces a Cotton-φ-perfect fluid structure for the spatial factor, generalizing φ-SPFST with reduction conditions, level-set geometry, and rigidity under curvature assumptions.