{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:3OI74QWHZAKVE2HL3C5NXOUDEG","short_pith_number":"pith:3OI74QWH","canonical_record":{"source":{"id":"2302.14858","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-02-28T18:57:09Z","cross_cats_sorted":["cs.NA","math.NA"],"title_canon_sha256":"eeb0e1ffc4c69ec3985a47c2656b40db19fe8d6ba5ed5076e30b60d7479a77da","abstract_canon_sha256":"ebc4df37e7f638ad5ee78740695d77c324193ac3977da111138b50e59e77f21a"},"schema_version":"1.0"},"canonical_sha256":"db91fe42c7c8155268ebd8badbba8321ba2a810a820322b65e95b19fb4f168dd","source":{"kind":"arxiv","id":"2302.14858","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.14858","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"arxiv_version","alias_value":"2302.14858v1","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.14858","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"pith_short_12","alias_value":"3OI74QWHZAKV","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"pith_short_16","alias_value":"3OI74QWHZAKVE2HL","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"pith_short_8","alias_value":"3OI74QWH","created_at":"2026-07-05T05:46:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:3OI74QWHZAKVE2HL3C5NXOUDEG","target":"record","payload":{"canonical_record":{"source":{"id":"2302.14858","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-02-28T18:57:09Z","cross_cats_sorted":["cs.NA","math.NA"],"title_canon_sha256":"eeb0e1ffc4c69ec3985a47c2656b40db19fe8d6ba5ed5076e30b60d7479a77da","abstract_canon_sha256":"ebc4df37e7f638ad5ee78740695d77c324193ac3977da111138b50e59e77f21a"},"schema_version":"1.0"},"canonical_sha256":"db91fe42c7c8155268ebd8badbba8321ba2a810a820322b65e95b19fb4f168dd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:46:50.694999Z","signature_b64":"KuLFEl+soBgKe2oeIsM9AqisPZHKZQ1UKGG/ukA4z7l7jGulnoZZH4ktyhK+wfz+1otKidtWbciYXoQ9fGviAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"db91fe42c7c8155268ebd8badbba8321ba2a810a820322b65e95b19fb4f168dd","last_reissued_at":"2026-07-05T05:46:50.694544Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:46:50.694544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.14858","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:46:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XX4/ZYh3pN8C4A8JvqL1N7kIvnO1gY5p5o1VDgzgMFveslzWr5LL56+HZ8i+lc8Ps+D6ZCt+ylYtbB9AKBVgCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T19:54:37.176284Z"},"content_sha256":"afb1b0e12a040fec9540fcee8c209f939505de01d438b4d025a01bc3c425639b","schema_version":"1.0","event_id":"sha256:afb1b0e12a040fec9540fcee8c209f939505de01d438b4d025a01bc3c425639b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:3OI74QWHZAKVE2HL3C5NXOUDEG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectrally-tuned compact finite-difference schemes with domain decomposition and applications to numerical relativity","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.NA","math.NA"],"primary_cat":"gr-qc","authors_text":"Boris Daszuta","submitted_at":"2023-02-28T18:57:09Z","abstract_excerpt":"Compact finite-difference (FD) schemes specify derivative approximations implicitly, thus to achieve parallelism with domain-decomposition suitable partitioning of linear systems is required. Consistent order of accuracy, dispersion, and dissipation is crucial to maintain in wave propagation problems such that deformation of the associated spectra of the discretized problems is not too severe. In this work we consider numerically tuning spectral error, at fixed formal order of accuracy to automatically devise new compact FD schemes. Grid convergence tests indicate error reduction of at least a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.14858","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/2302.14858/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:46:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1pIuFbvxdjzsD26mQDsL/ZOvxqn4VLotvfU5Z+zKZIK1cF95ZCWteR/Vo8Zb1mBJEBVFrpUbPUm/pSlyCx2zAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T19:54:37.176904Z"},"content_sha256":"57ea0ba516f8edbfe603c0ddb5ef7b50a14841873b005737b8b029c7dae13af6","schema_version":"1.0","event_id":"sha256:57ea0ba516f8edbfe603c0ddb5ef7b50a14841873b005737b8b029c7dae13af6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3OI74QWHZAKVE2HL3C5NXOUDEG/bundle.json","state_url":"https://pith.science/pith/3OI74QWHZAKVE2HL3C5NXOUDEG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3OI74QWHZAKVE2HL3C5NXOUDEG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-22T19:54:37Z","links":{"resolver":"https://pith.science/pith/3OI74QWHZAKVE2HL3C5NXOUDEG","bundle":"https://pith.science/pith/3OI74QWHZAKVE2HL3C5NXOUDEG/bundle.json","state":"https://pith.science/pith/3OI74QWHZAKVE2HL3C5NXOUDEG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3OI74QWHZAKVE2HL3C5NXOUDEG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:3OI74QWHZAKVE2HL3C5NXOUDEG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"ebc4df37e7f638ad5ee78740695d77c324193ac3977da111138b50e59e77f21a","cross_cats_sorted":["cs.NA","math.NA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-02-28T18:57:09Z","title_canon_sha256":"eeb0e1ffc4c69ec3985a47c2656b40db19fe8d6ba5ed5076e30b60d7479a77da"},"schema_version":"1.0","source":{"id":"2302.14858","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.14858","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"arxiv_version","alias_value":"2302.14858v1","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.14858","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"pith_short_12","alias_value":"3OI74QWHZAKV","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"pith_short_16","alias_value":"3OI74QWHZAKVE2HL","created_at":"2026-07-05T05:46:50Z"},{"alias_kind":"pith_short_8","alias_value":"3OI74QWH","created_at":"2026-07-05T05:46:50Z"}],"graph_snapshots":[{"event_id":"sha256:57ea0ba516f8edbfe603c0ddb5ef7b50a14841873b005737b8b029c7dae13af6","target":"graph","created_at":"2026-07-05T05:46:50Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2302.14858/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Compact finite-difference (FD) schemes specify derivative approximations implicitly, thus to achieve parallelism with domain-decomposition suitable partitioning of linear systems is required. Consistent order of accuracy, dispersion, and dissipation is crucial to maintain in wave propagation problems such that deformation of the associated spectra of the discretized problems is not too severe. In this work we consider numerically tuning spectral error, at fixed formal order of accuracy to automatically devise new compact FD schemes. Grid convergence tests indicate error reduction of at least a","authors_text":"Boris Daszuta","cross_cats":["cs.NA","math.NA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-02-28T18:57:09Z","title":"Spectrally-tuned compact finite-difference schemes with domain decomposition and applications to numerical relativity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.14858","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:afb1b0e12a040fec9540fcee8c209f939505de01d438b4d025a01bc3c425639b","target":"record","created_at":"2026-07-05T05:46:50Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"ebc4df37e7f638ad5ee78740695d77c324193ac3977da111138b50e59e77f21a","cross_cats_sorted":["cs.NA","math.NA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-02-28T18:57:09Z","title_canon_sha256":"eeb0e1ffc4c69ec3985a47c2656b40db19fe8d6ba5ed5076e30b60d7479a77da"},"schema_version":"1.0","source":{"id":"2302.14858","kind":"arxiv","version":1}},"canonical_sha256":"db91fe42c7c8155268ebd8badbba8321ba2a810a820322b65e95b19fb4f168dd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"db91fe42c7c8155268ebd8badbba8321ba2a810a820322b65e95b19fb4f168dd","first_computed_at":"2026-07-05T05:46:50.694544Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:46:50.694544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KuLFEl+soBgKe2oeIsM9AqisPZHKZQ1UKGG/ukA4z7l7jGulnoZZH4ktyhK+wfz+1otKidtWbciYXoQ9fGviAg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:46:50.694999Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.14858","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afb1b0e12a040fec9540fcee8c209f939505de01d438b4d025a01bc3c425639b","sha256:57ea0ba516f8edbfe603c0ddb5ef7b50a14841873b005737b8b029c7dae13af6"],"state_sha256":"8cdecf081468c8b0e23c72966b8ab9d02215c930fd02ab6101140267e8904ae7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QRzhelHojAxuxx/4ZCInKCukxj6owZy0httcuSZOzdCs6W4qgf0veafQw8N8X9FxlZxz0ZWgrMcuhGRxCcdNDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T19:54:37.181198Z","bundle_sha256":"6ae5ba7abf56bd6eeda769ef40791386798c376b420246d2246107f20b19b539"}}