{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:6F3TFR7YF4XN3TFHW2BOKDLT6W","short_pith_number":"pith:6F3TFR7Y","canonical_record":{"source":{"id":"1804.06742","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2018-04-18T14:07:41Z","cross_cats_sorted":["cs.CE"],"title_canon_sha256":"797fc2e2475a2e833bab4625f3e80db2a808a60eb77865877ad414a7f97be9f1","abstract_canon_sha256":"0ca1a6ff36ed300cc8119e616dce3ce15caed8ae81f7275dd1a0824be47f8e31"},"schema_version":"1.0"},"canonical_sha256":"f17732c7f82f2eddcca7b682e50d73f594d714a6797bc7d7ad11026c1d4e8ebb","source":{"kind":"arxiv","id":"1804.06742","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06742","created_at":"2026-05-18T00:18:05Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06742v1","created_at":"2026-05-18T00:18:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06742","created_at":"2026-05-18T00:18:05Z"},{"alias_kind":"pith_short_12","alias_value":"6F3TFR7YF4XN","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6F3TFR7YF4XN3TFH","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6F3TFR7Y","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:6F3TFR7YF4XN3TFHW2BOKDLT6W","target":"record","payload":{"canonical_record":{"source":{"id":"1804.06742","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2018-04-18T14:07:41Z","cross_cats_sorted":["cs.CE"],"title_canon_sha256":"797fc2e2475a2e833bab4625f3e80db2a808a60eb77865877ad414a7f97be9f1","abstract_canon_sha256":"0ca1a6ff36ed300cc8119e616dce3ce15caed8ae81f7275dd1a0824be47f8e31"},"schema_version":"1.0"},"canonical_sha256":"f17732c7f82f2eddcca7b682e50d73f594d714a6797bc7d7ad11026c1d4e8ebb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:05.866154Z","signature_b64":"wn90ioitgA6TiRfUUdZYQeageAIUDFk3GWIYPe362b8vlSAE1aLHmP9XJk7OzBaqATt8vP3RpDRmuE++caMFBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f17732c7f82f2eddcca7b682e50d73f594d714a6797bc7d7ad11026c1d4e8ebb","last_reissued_at":"2026-05-18T00:18:05.865435Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:05.865435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.06742","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":"2026-05-18T00:18:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TF22baV0nUI3On4Ro2/tZtKeFbjSs5bsgfzwmjgNnJl01K9j8ewzY+v61b0UF7ztkMmzyjAl07vHCbMXSXeOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T14:01:18.348170Z"},"content_sha256":"e14080ef9f31562a3a5decf748d4a99f238f97788f01e70687cdffe13ce6ed3a","schema_version":"1.0","event_id":"sha256:e14080ef9f31562a3a5decf748d4a99f238f97788f01e70687cdffe13ce6ed3a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:6F3TFR7YF4XN3TFHW2BOKDLT6W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An efficient open-source implementation to compute the Jacobian matrix for the Newton-Raphson power flow algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CE"],"primary_cat":"stat.CO","authors_text":"Florian Sch\\\"afer, Martin Braun","submitted_at":"2018-04-18T14:07:41Z","abstract_excerpt":"Power flow calculations for systems with a large number of buses, e.g. grids with multiple voltage levels, or time series based calculations result in a high computational effort. A common power flow solver for the efficient analysis of power systems is the Newton-Raphson algorithm. The main computational effort of this method results from the linearization of the nonlinear power flow problem and solving the resulting linear equation. This paper presents an algorithm for the fast linearization of the power flow problem by creating the Jacobian matrix directly in CRS format. The increase in spe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06742","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:18:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DO+94DaUVmVZhaFN1E/9RynjClYDvYhKPiRnQWznp/KW6LvCtel2Pa1FO6otB5ChR+9hMNkPk/5l2MFTXA7sCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T14:01:18.348807Z"},"content_sha256":"8814ab60a33de7441603b2363802d0bf148b133a86ccf946eacfd2fd69c2c7a8","schema_version":"1.0","event_id":"sha256:8814ab60a33de7441603b2363802d0bf148b133a86ccf946eacfd2fd69c2c7a8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6F3TFR7YF4XN3TFHW2BOKDLT6W/bundle.json","state_url":"https://pith.science/pith/6F3TFR7YF4XN3TFHW2BOKDLT6W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6F3TFR7YF4XN3TFHW2BOKDLT6W/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":"2026-05-22T14:01:18Z","links":{"resolver":"https://pith.science/pith/6F3TFR7YF4XN3TFHW2BOKDLT6W","bundle":"https://pith.science/pith/6F3TFR7YF4XN3TFHW2BOKDLT6W/bundle.json","state":"https://pith.science/pith/6F3TFR7YF4XN3TFHW2BOKDLT6W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6F3TFR7YF4XN3TFHW2BOKDLT6W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:6F3TFR7YF4XN3TFHW2BOKDLT6W","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":"0ca1a6ff36ed300cc8119e616dce3ce15caed8ae81f7275dd1a0824be47f8e31","cross_cats_sorted":["cs.CE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2018-04-18T14:07:41Z","title_canon_sha256":"797fc2e2475a2e833bab4625f3e80db2a808a60eb77865877ad414a7f97be9f1"},"schema_version":"1.0","source":{"id":"1804.06742","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06742","created_at":"2026-05-18T00:18:05Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06742v1","created_at":"2026-05-18T00:18:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06742","created_at":"2026-05-18T00:18:05Z"},{"alias_kind":"pith_short_12","alias_value":"6F3TFR7YF4XN","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6F3TFR7YF4XN3TFH","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6F3TFR7Y","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:8814ab60a33de7441603b2363802d0bf148b133a86ccf946eacfd2fd69c2c7a8","target":"graph","created_at":"2026-05-18T00:18:05Z","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"},"paper":{"abstract_excerpt":"Power flow calculations for systems with a large number of buses, e.g. grids with multiple voltage levels, or time series based calculations result in a high computational effort. A common power flow solver for the efficient analysis of power systems is the Newton-Raphson algorithm. The main computational effort of this method results from the linearization of the nonlinear power flow problem and solving the resulting linear equation. This paper presents an algorithm for the fast linearization of the power flow problem by creating the Jacobian matrix directly in CRS format. The increase in spe","authors_text":"Florian Sch\\\"afer, Martin Braun","cross_cats":["cs.CE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2018-04-18T14:07:41Z","title":"An efficient open-source implementation to compute the Jacobian matrix for the Newton-Raphson power flow algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06742","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:e14080ef9f31562a3a5decf748d4a99f238f97788f01e70687cdffe13ce6ed3a","target":"record","created_at":"2026-05-18T00:18:05Z","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":"0ca1a6ff36ed300cc8119e616dce3ce15caed8ae81f7275dd1a0824be47f8e31","cross_cats_sorted":["cs.CE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2018-04-18T14:07:41Z","title_canon_sha256":"797fc2e2475a2e833bab4625f3e80db2a808a60eb77865877ad414a7f97be9f1"},"schema_version":"1.0","source":{"id":"1804.06742","kind":"arxiv","version":1}},"canonical_sha256":"f17732c7f82f2eddcca7b682e50d73f594d714a6797bc7d7ad11026c1d4e8ebb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f17732c7f82f2eddcca7b682e50d73f594d714a6797bc7d7ad11026c1d4e8ebb","first_computed_at":"2026-05-18T00:18:05.865435Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:05.865435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wn90ioitgA6TiRfUUdZYQeageAIUDFk3GWIYPe362b8vlSAE1aLHmP9XJk7OzBaqATt8vP3RpDRmuE++caMFBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:05.866154Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.06742","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e14080ef9f31562a3a5decf748d4a99f238f97788f01e70687cdffe13ce6ed3a","sha256:8814ab60a33de7441603b2363802d0bf148b133a86ccf946eacfd2fd69c2c7a8"],"state_sha256":"66bce21b947dac6df93b4225774a7c4116895b4d77d5dd052787fdc6c4e51d65"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OP6tp70x3qKJWCxwSaLGUgM/+UahYPbSwNMZo6xymROj7Fie3lh47CuBG21owonDeyWt0olY+LsDZWe6stV4BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T14:01:18.352306Z","bundle_sha256":"bbb28f45d83f946a669717a293fda11bc0462c9015ad26748ec1ce322d577295"}}