{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:KKXMFG2QAM3D2XCAEPK6VGXLYX","short_pith_number":"pith:KKXMFG2Q","schema_version":"1.0","canonical_sha256":"52aec29b5003363d5c4023d5ea9aebc5fef3ee7b170bafcfc1aa849c26c71564","source":{"kind":"arxiv","id":"0801.1455","version":2},"attestation_state":"computed","paper":{"title":"A Fully Pseudospectral Scheme for Solving Singular Hyperbolic Equations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"J\\\"org Hennig, Marcus Ansorg","submitted_at":"2008-01-09T16:13:19Z","abstract_excerpt":"With the example of the spherically symmetric scalar wave equation on Minkowski space-time we demonstrate that a fully pseudospectral scheme (i.e. spectral with respect to both spatial and time directions) can be applied for solving hyperbolic equations. The calculations are carried out within the framework of conformally compactified space-times. In our formulation, the equation becomes singular at null infinity and yields regular boundary conditions there. In this manner it becomes possible to avoid \"artificial\" conditions at some numerical outer boundary at a finite distance. We obtain high"},"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":"0801.1455","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2008-01-09T16:13:19Z","cross_cats_sorted":[],"title_canon_sha256":"99deb01da1ba0dfb557026fb722f22d9383c86aaae1fe3de23cd29e42298d28e","abstract_canon_sha256":"3c29fd9072c8b68112d0841c77e2d9a594b674b5c13ae8ab82c44943cd92f488"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:37:11.544860Z","signature_b64":"6SXw4558hNgAskFTqtQbOZ61TcloIAF5BLqq+JHOOgbDxYLUWwIzVJ0qSh3L0GF6ScEUseePpJ/SB5t7j56xBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52aec29b5003363d5c4023d5ea9aebc5fef3ee7b170bafcfc1aa849c26c71564","last_reissued_at":"2026-05-18T04:37:11.544053Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:37:11.544053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Fully Pseudospectral Scheme for Solving Singular Hyperbolic Equations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"J\\\"org Hennig, Marcus Ansorg","submitted_at":"2008-01-09T16:13:19Z","abstract_excerpt":"With the example of the spherically symmetric scalar wave equation on Minkowski space-time we demonstrate that a fully pseudospectral scheme (i.e. spectral with respect to both spatial and time directions) can be applied for solving hyperbolic equations. The calculations are carried out within the framework of conformally compactified space-times. In our formulation, the equation becomes singular at null infinity and yields regular boundary conditions there. In this manner it becomes possible to avoid \"artificial\" conditions at some numerical outer boundary at a finite distance. We obtain high"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.1455","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":"0801.1455","created_at":"2026-05-18T04:37:11.544171+00:00"},{"alias_kind":"arxiv_version","alias_value":"0801.1455v2","created_at":"2026-05-18T04:37:11.544171+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.1455","created_at":"2026-05-18T04:37:11.544171+00:00"},{"alias_kind":"pith_short_12","alias_value":"KKXMFG2QAM3D","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"KKXMFG2QAM3D2XCA","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"KKXMFG2Q","created_at":"2026-05-18T12:25:57.157939+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/KKXMFG2QAM3D2XCAEPK6VGXLYX","json":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX.json","graph_json":"https://pith.science/api/pith-number/KKXMFG2QAM3D2XCAEPK6VGXLYX/graph.json","events_json":"https://pith.science/api/pith-number/KKXMFG2QAM3D2XCAEPK6VGXLYX/events.json","paper":"https://pith.science/paper/KKXMFG2Q"},"agent_actions":{"view_html":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX","download_json":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX.json","view_paper":"https://pith.science/paper/KKXMFG2Q","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0801.1455&json=true","fetch_graph":"https://pith.science/api/pith-number/KKXMFG2QAM3D2XCAEPK6VGXLYX/graph.json","fetch_events":"https://pith.science/api/pith-number/KKXMFG2QAM3D2XCAEPK6VGXLYX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX/action/storage_attestation","attest_author":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX/action/author_attestation","sign_citation":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX/action/citation_signature","submit_replication":"https://pith.science/pith/KKXMFG2QAM3D2XCAEPK6VGXLYX/action/replication_record"}},"created_at":"2026-05-18T04:37:11.544171+00:00","updated_at":"2026-05-18T04:37:11.544171+00:00"}