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Cai R G, Ji J Y, Soh K S 1998Classical, Quantum Gravity152783 ISSN 0264-9381 URL https://doi · DOI 10.1088/0264-9381/15/9/023

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gr-qc 1

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2026 1

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Warped Product Einstein Manifolds in Four Dimensions

gr-qc · 2026-06-06 · unverdicted · novelty 6.0

Einstein warped products in 4D are classified algebraically via curvature matrix blocks into Petrov types (3+1 generically type I, 2+2 type D, 1+3 type O), with closed Riemannian half-conformally flat cases required to be flat.

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  • Warped Product Einstein Manifolds in Four Dimensions gr-qc · 2026-06-06 · unverdicted · none · ref 16

    Einstein warped products in 4D are classified algebraically via curvature matrix blocks into Petrov types (3+1 generically type I, 2+2 type D, 1+3 type O), with closed Riemannian half-conformally flat cases required to be flat.