{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:SA2WJFHP4GSYGD4G5OY752NSJK","short_pith_number":"pith:SA2WJFHP","schema_version":"1.0","canonical_sha256":"90356494efe1a5830f86ebb1fee9b24a897a9aa8f82aad76f5f82261209241cb","source":{"kind":"arxiv","id":"1201.0137","version":2},"attestation_state":"computed","paper":{"title":"Two-Sided Gravitational Mirror: Sealing off Curvature Singularities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Aharon Davidson, Ben Yellin","submitted_at":"2011-12-30T15:12:20Z","abstract_excerpt":"A gravitational mirror is a non-singular finite redshift surface which bounces all incident null geodesics. While a white mirror (outward bouncing) resembles 't Hooft's brick wall, a black mirror (inward bouncing) offers a novel mechanism for sealing off curvature singularities. The geometry underlying a two-sided mirror is characterized by a single signature change, to be contrasted with the signature flip which governs the black hole geometry. To demonstrate the phenomenon analytically, we derive an exact, static, radially symmetric, two-sided mirror solution, which asymptotes the massless B"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1201.0137","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-12-30T15:12:20Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"1f21710f48894b05dab3e08fe6d8fbaa05317a3f7c5d7291d13b5de62762d686","abstract_canon_sha256":"12361635c3bb14de7155c958b3aff801e03a135d5c9379f322c8b2b9a2024ce5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:04:44.526664Z","signature_b64":"B5hyq/ZNVv7CEd2SxDqBX3bPS1fAoIbc4/fRt6ALAe59PImeyMe/VhAEZRSOK9ty7KjKfhaxweAsNp3h/msMCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"90356494efe1a5830f86ebb1fee9b24a897a9aa8f82aad76f5f82261209241cb","last_reissued_at":"2026-05-18T04:04:44.525891Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:04:44.525891Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Two-Sided Gravitational Mirror: Sealing off Curvature Singularities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Aharon Davidson, Ben Yellin","submitted_at":"2011-12-30T15:12:20Z","abstract_excerpt":"A gravitational mirror is a non-singular finite redshift surface which bounces all incident null geodesics. While a white mirror (outward bouncing) resembles 't Hooft's brick wall, a black mirror (inward bouncing) offers a novel mechanism for sealing off curvature singularities. The geometry underlying a two-sided mirror is characterized by a single signature change, to be contrasted with the signature flip which governs the black hole geometry. To demonstrate the phenomenon analytically, we derive an exact, static, radially symmetric, two-sided mirror solution, which asymptotes the massless B"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.0137","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1201.0137","created_at":"2026-05-18T04:04:44.526017+00:00"},{"alias_kind":"arxiv_version","alias_value":"1201.0137v2","created_at":"2026-05-18T04:04:44.526017+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.0137","created_at":"2026-05-18T04:04:44.526017+00:00"},{"alias_kind":"pith_short_12","alias_value":"SA2WJFHP4GSY","created_at":"2026-05-18T12:26:41.206345+00:00"},{"alias_kind":"pith_short_16","alias_value":"SA2WJFHP4GSYGD4G","created_at":"2026-05-18T12:26:41.206345+00:00"},{"alias_kind":"pith_short_8","alias_value":"SA2WJFHP","created_at":"2026-05-18T12:26:41.206345+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK","json":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK.json","graph_json":"https://pith.science/api/pith-number/SA2WJFHP4GSYGD4G5OY752NSJK/graph.json","events_json":"https://pith.science/api/pith-number/SA2WJFHP4GSYGD4G5OY752NSJK/events.json","paper":"https://pith.science/paper/SA2WJFHP"},"agent_actions":{"view_html":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK","download_json":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK.json","view_paper":"https://pith.science/paper/SA2WJFHP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1201.0137&json=true","fetch_graph":"https://pith.science/api/pith-number/SA2WJFHP4GSYGD4G5OY752NSJK/graph.json","fetch_events":"https://pith.science/api/pith-number/SA2WJFHP4GSYGD4G5OY752NSJK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK/action/storage_attestation","attest_author":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK/action/author_attestation","sign_citation":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK/action/citation_signature","submit_replication":"https://pith.science/pith/SA2WJFHP4GSYGD4G5OY752NSJK/action/replication_record"}},"created_at":"2026-05-18T04:04:44.526017+00:00","updated_at":"2026-05-18T04:04:44.526017+00:00"}