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19972026
most citedHypersurface-orthogonal generators of an orthogonally transitive transitive , topological identifications, and axially and cylindrically symmetric spacetimes

40 citations · 65 across the 5 of their papers we have counts for

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gr-qc2026

Comment: Exact vacuum solution with Hopf structure in general relativity

Malcolm A. H. MacCallum

Harada's recently announced Kerr-Schild solution of Einstein's equations in general relativity [Phys. Rev. D {\bf 112}, 024020 92025)] is identified as isometric with one of the we…