{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:NFSVVJEFMKIJZHCIOVMUWTJYM4","short_pith_number":"pith:NFSVVJEF","schema_version":"1.0","canonical_sha256":"69655aa48562909c9c4875594b4d38672e6bb8b917a840352072e5f873bf80db","source":{"kind":"arxiv","id":"1905.07514","version":1},"attestation_state":"computed","paper":{"title":"Bondi-Metzner-Sachs invariance and electric-magnetic duality","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Alfredo P\\'erez, Andr\\'es Gomberoff, Claudio Bunster","submitted_at":"2019-05-18T00:59:45Z","abstract_excerpt":"We exhibit a Hamiltonian formulation, both for electromagnetism and gravitation, in which it is not required that the Bondi \"news\" vanish, but only that the incoming news be equal to the outgoing ones. This requirement is implemented by defining the fields on a two-sheeted hyperbolic surface, which we term \"the hourglass\". It is a spacelike deformation of the complete lightcone. On it one approaches asymptotically (null) past and future infinity while remaining at a fixed (hyperbolic) time, by going to large spatial distances on its two sheets. The Hamiltonian formulation and -- in particular "},"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":"1905.07514","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-05-18T00:59:45Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"ce9e6b10b3010dc80b0331a7234fdfd3b6bb164a8afa4ec46a99aa4ac1e5d0a3","abstract_canon_sha256":"1e0266eba2f9ac6b8eed4e07fc61232479b08b55b0e4d7a6529c815505218fb6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:39:55.239690Z","signature_b64":"SY7kES9ps3p9BclymOvaabbAGQZY8WqxjLWSVNoYbUYvHycDQUatQ0ihL9bMJQl7EBxLugxKhaIpqz0tTwCUCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"69655aa48562909c9c4875594b4d38672e6bb8b917a840352072e5f873bf80db","last_reissued_at":"2026-07-05T00:39:55.239166Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:39:55.239166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Bondi-Metzner-Sachs invariance and electric-magnetic duality","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Alfredo P\\'erez, Andr\\'es Gomberoff, Claudio Bunster","submitted_at":"2019-05-18T00:59:45Z","abstract_excerpt":"We exhibit a Hamiltonian formulation, both for electromagnetism and gravitation, in which it is not required that the Bondi \"news\" vanish, but only that the incoming news be equal to the outgoing ones. This requirement is implemented by defining the fields on a two-sheeted hyperbolic surface, which we term \"the hourglass\". It is a spacelike deformation of the complete lightcone. On it one approaches asymptotically (null) past and future infinity while remaining at a fixed (hyperbolic) time, by going to large spatial distances on its two sheets. The Hamiltonian formulation and -- in particular "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.07514","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1905.07514/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"1905.07514","created_at":"2026-07-05T00:39:55.239223+00:00"},{"alias_kind":"arxiv_version","alias_value":"1905.07514v1","created_at":"2026-07-05T00:39:55.239223+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.07514","created_at":"2026-07-05T00:39:55.239223+00:00"},{"alias_kind":"pith_short_12","alias_value":"NFSVVJEFMKIJ","created_at":"2026-07-05T00:39:55.239223+00:00"},{"alias_kind":"pith_short_16","alias_value":"NFSVVJEFMKIJZHCI","created_at":"2026-07-05T00:39:55.239223+00:00"},{"alias_kind":"pith_short_8","alias_value":"NFSVVJEF","created_at":"2026-07-05T00:39:55.239223+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"1908.10385","citing_title":"Source and Response Soft Charges for Maxwell Theory on $AdS_d$","ref_index":38,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4","json":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4.json","graph_json":"https://pith.science/api/pith-number/NFSVVJEFMKIJZHCIOVMUWTJYM4/graph.json","events_json":"https://pith.science/api/pith-number/NFSVVJEFMKIJZHCIOVMUWTJYM4/events.json","paper":"https://pith.science/paper/NFSVVJEF"},"agent_actions":{"view_html":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4","download_json":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4.json","view_paper":"https://pith.science/paper/NFSVVJEF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1905.07514&json=true","fetch_graph":"https://pith.science/api/pith-number/NFSVVJEFMKIJZHCIOVMUWTJYM4/graph.json","fetch_events":"https://pith.science/api/pith-number/NFSVVJEFMKIJZHCIOVMUWTJYM4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4/action/storage_attestation","attest_author":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4/action/author_attestation","sign_citation":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4/action/citation_signature","submit_replication":"https://pith.science/pith/NFSVVJEFMKIJZHCIOVMUWTJYM4/action/replication_record"}},"created_at":"2026-07-05T00:39:55.239223+00:00","updated_at":"2026-07-05T00:39:55.239223+00:00"}