{"paper":{"title":"R=0 spacetimes and self-dual Lorentzian wormholes","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Matt Visser (Washington), Naresh Dadhich (IUCAA), Sailajananda Mukherji (NBU), Sayan Kar (IITKgp)","submitted_at":"2001-09-19T17:00:02Z","abstract_excerpt":"A two-parameter family of spherically symmetric, static Lorentzian wormholes is obtained as the general solution of the equation $\\rho=\\rho_t=0$, where $\\rho = T_{ij} u^iu^j$, $\\rho_t = (T_{ij} - {1\\over2} T g_{ij}) u^iu^j$, and $u^i u_i =- 1$. This equation characterizes a class of spacetimes which are ``self dual'' (in the sense of electrogravity duality). The class includes the Schwarzschild black hole, a family of naked singularities, and a disjoint family of Lorentzian wormholes, all of which have vanishing scalar curvature (R=0). Properties of these spacetimes are discussed. Using isotro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0109069","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}