{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:CHZ3VUDFU6WM2TPCOBXVXSJUVV","short_pith_number":"pith:CHZ3VUDF","schema_version":"1.0","canonical_sha256":"11f3bad065a7accd4de2706f5bc934ad4d49058706a9ff2ed8624552fc4c6399","source":{"kind":"arxiv","id":"1601.04079","version":1},"attestation_state":"computed","paper":{"title":"Free hyperboloidal evolution in spherical symmetry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Alex Va\\~n\\'o-Vi\\~nuales, Sascha Husa","submitted_at":"2016-01-15T21:20:47Z","abstract_excerpt":"We address the hyperboloidal initial value problem in the context of Numerical Relativity, motivated by its evolution on hyperboloidal slices: smooth spacelike slices that reach future null infinity, the \"location\" in spacetime where radiation is to be extracted. Our approach uses the BSSN and Z4 formulations and a time-independent conformal factor. The resulting system of PDEs includes formally diverging terms at null infinity. Here we discuss a regularized numerical scheme in spherical symmetry. A critical ingredient are the gauge conditions, which control the treatment of future null infini"},"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":"1601.04079","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-01-15T21:20:47Z","cross_cats_sorted":[],"title_canon_sha256":"404cdc3404c0cfef9826e3a788c7bd0f3be3b29751381a3dc2c8f880e3253f8c","abstract_canon_sha256":"3d64440ed863263f60ebf16abc57a8b12b5a940bd4faf943859dedb6661bdf64"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:45.958730Z","signature_b64":"qzVWU8MLbaCxKrKVW8Q7JFoDurY4GBX7Q79iPNZsbM7jFmVa6eGzPeNEptm2nc3XnjQwQoebUWUz83lfxaIYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"11f3bad065a7accd4de2706f5bc934ad4d49058706a9ff2ed8624552fc4c6399","last_reissued_at":"2026-05-18T01:22:45.958264Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:45.958264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Free hyperboloidal evolution in spherical symmetry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Alex Va\\~n\\'o-Vi\\~nuales, Sascha Husa","submitted_at":"2016-01-15T21:20:47Z","abstract_excerpt":"We address the hyperboloidal initial value problem in the context of Numerical Relativity, motivated by its evolution on hyperboloidal slices: smooth spacelike slices that reach future null infinity, the \"location\" in spacetime where radiation is to be extracted. Our approach uses the BSSN and Z4 formulations and a time-independent conformal factor. The resulting system of PDEs includes formally diverging terms at null infinity. Here we discuss a regularized numerical scheme in spherical symmetry. A critical ingredient are the gauge conditions, which control the treatment of future null infini"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04079","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1601.04079","created_at":"2026-05-18T01:22:45.958348+00:00"},{"alias_kind":"arxiv_version","alias_value":"1601.04079v1","created_at":"2026-05-18T01:22:45.958348+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04079","created_at":"2026-05-18T01:22:45.958348+00:00"},{"alias_kind":"pith_short_12","alias_value":"CHZ3VUDFU6WM","created_at":"2026-05-18T12:30:09.641336+00:00"},{"alias_kind":"pith_short_16","alias_value":"CHZ3VUDFU6WM2TPC","created_at":"2026-05-18T12:30:09.641336+00:00"},{"alias_kind":"pith_short_8","alias_value":"CHZ3VUDF","created_at":"2026-05-18T12:30:09.641336+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/CHZ3VUDFU6WM2TPCOBXVXSJUVV","json":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV.json","graph_json":"https://pith.science/api/pith-number/CHZ3VUDFU6WM2TPCOBXVXSJUVV/graph.json","events_json":"https://pith.science/api/pith-number/CHZ3VUDFU6WM2TPCOBXVXSJUVV/events.json","paper":"https://pith.science/paper/CHZ3VUDF"},"agent_actions":{"view_html":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV","download_json":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV.json","view_paper":"https://pith.science/paper/CHZ3VUDF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1601.04079&json=true","fetch_graph":"https://pith.science/api/pith-number/CHZ3VUDFU6WM2TPCOBXVXSJUVV/graph.json","fetch_events":"https://pith.science/api/pith-number/CHZ3VUDFU6WM2TPCOBXVXSJUVV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV/action/storage_attestation","attest_author":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV/action/author_attestation","sign_citation":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV/action/citation_signature","submit_replication":"https://pith.science/pith/CHZ3VUDFU6WM2TPCOBXVXSJUVV/action/replication_record"}},"created_at":"2026-05-18T01:22:45.958348+00:00","updated_at":"2026-05-18T01:22:45.958348+00:00"}