{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PAAX3V7JEGVT2MFVGTLVHRDRVF","short_pith_number":"pith:PAAX3V7J","canonical_record":{"source":{"id":"2101.07844","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2021-01-19T20:12:30Z","cross_cats_sorted":["cs.AI","cs.SY","eess.SY"],"title_canon_sha256":"ac87bcbca7ac901e2aec54adf49da4b237a52b725be3d0fc8fa50bcb19f0a2da","abstract_canon_sha256":"c81a5056cdf8bd9441e4970505252764bafcc0fd7680ec0dbbae921d0cf96128"},"schema_version":"1.0"},"canonical_sha256":"78017dd7e921ab3d30b534d753c471a957f3309dcd08d81d78909305dd9f80eb","source":{"kind":"arxiv","id":"2101.07844","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.07844","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"arxiv_version","alias_value":"2101.07844v1","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.07844","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"pith_short_12","alias_value":"PAAX3V7JEGVT","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"pith_short_16","alias_value":"PAAX3V7JEGVT2MFV","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"pith_short_8","alias_value":"PAAX3V7J","created_at":"2026-07-05T02:08:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PAAX3V7JEGVT2MFVGTLVHRDRVF","target":"record","payload":{"canonical_record":{"source":{"id":"2101.07844","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2021-01-19T20:12:30Z","cross_cats_sorted":["cs.AI","cs.SY","eess.SY"],"title_canon_sha256":"ac87bcbca7ac901e2aec54adf49da4b237a52b725be3d0fc8fa50bcb19f0a2da","abstract_canon_sha256":"c81a5056cdf8bd9441e4970505252764bafcc0fd7680ec0dbbae921d0cf96128"},"schema_version":"1.0"},"canonical_sha256":"78017dd7e921ab3d30b534d753c471a957f3309dcd08d81d78909305dd9f80eb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:08:22.587805Z","signature_b64":"9hN8RD2jYMVt9vhU85VqlLARJ5zk94JZIZHW7cs4bUtOQrGX7TrWxpnALbc6v57hv6zEpg8k3kq96EgDuoFcAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78017dd7e921ab3d30b534d753c471a957f3309dcd08d81d78909305dd9f80eb","last_reissued_at":"2026-07-05T02:08:22.587370Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:08:22.587370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.07844","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":"2026-07-05T02:08:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yilgAq7BA6TtwSKS3HVA3USVtc4y6TMtW5BpjPKO549gIqYGlYk6o+tMZSzJD6n7mtqR6bbXOq8qHCPcPLFiCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T17:45:19.155035Z"},"content_sha256":"887adfd23db9b11d2935596fb44f65478e21022227bddfe36bc1199b1e161498","schema_version":"1.0","event_id":"sha256:887adfd23db9b11d2935596fb44f65478e21022227bddfe36bc1199b1e161498"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PAAX3V7JEGVT2MFVGTLVHRDRVF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scalable Optimization for Wind Farm Control using Coordination Graphs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI","cs.SY","eess.SY"],"primary_cat":"cs.LG","authors_text":"Diederik M. Roijers, Eugenio Bargiacchi, Jan Helsen, Pieter-Jan Daems, Pieter J.K. Libin, Timothy Verstraeten","submitted_at":"2021-01-19T20:12:30Z","abstract_excerpt":"Wind farms are a crucial driver toward the generation of ecological and renewable energy. Due to their rapid increase in capacity, contemporary wind farms need to adhere to strict constraints on power output to ensure stability of the electricity grid. Specifically, a wind farm controller is required to match the farm's power production with a power demand imposed by the grid operator. This is a non-trivial optimization problem, as complex dependencies exist between the wind turbines. State-of-the-art wind farm control typically relies on physics-based heuristics that fail to capture the full "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.07844","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/2101.07844/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":"2026-07-05T02:08:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gkhLbhGXY8FouYTJWogepUDkUeTk7yX9rBFVtfzu3CJeVkTM1o6b5+ZmTIiD179Qm3soUT+c2BI4hScaHjr6Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T17:45:19.155431Z"},"content_sha256":"b2c63f8e0b3648d6ad44f2b072697492b6f487b3dc261dff8f2c1a783f391a9a","schema_version":"1.0","event_id":"sha256:b2c63f8e0b3648d6ad44f2b072697492b6f487b3dc261dff8f2c1a783f391a9a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PAAX3V7JEGVT2MFVGTLVHRDRVF/bundle.json","state_url":"https://pith.science/pith/PAAX3V7JEGVT2MFVGTLVHRDRVF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PAAX3V7JEGVT2MFVGTLVHRDRVF/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":"2026-07-06T17:45:19Z","links":{"resolver":"https://pith.science/pith/PAAX3V7JEGVT2MFVGTLVHRDRVF","bundle":"https://pith.science/pith/PAAX3V7JEGVT2MFVGTLVHRDRVF/bundle.json","state":"https://pith.science/pith/PAAX3V7JEGVT2MFVGTLVHRDRVF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PAAX3V7JEGVT2MFVGTLVHRDRVF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PAAX3V7JEGVT2MFVGTLVHRDRVF","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":"c81a5056cdf8bd9441e4970505252764bafcc0fd7680ec0dbbae921d0cf96128","cross_cats_sorted":["cs.AI","cs.SY","eess.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2021-01-19T20:12:30Z","title_canon_sha256":"ac87bcbca7ac901e2aec54adf49da4b237a52b725be3d0fc8fa50bcb19f0a2da"},"schema_version":"1.0","source":{"id":"2101.07844","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.07844","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"arxiv_version","alias_value":"2101.07844v1","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.07844","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"pith_short_12","alias_value":"PAAX3V7JEGVT","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"pith_short_16","alias_value":"PAAX3V7JEGVT2MFV","created_at":"2026-07-05T02:08:22Z"},{"alias_kind":"pith_short_8","alias_value":"PAAX3V7J","created_at":"2026-07-05T02:08:22Z"}],"graph_snapshots":[{"event_id":"sha256:b2c63f8e0b3648d6ad44f2b072697492b6f487b3dc261dff8f2c1a783f391a9a","target":"graph","created_at":"2026-07-05T02:08:22Z","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/2101.07844/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Wind farms are a crucial driver toward the generation of ecological and renewable energy. Due to their rapid increase in capacity, contemporary wind farms need to adhere to strict constraints on power output to ensure stability of the electricity grid. Specifically, a wind farm controller is required to match the farm's power production with a power demand imposed by the grid operator. This is a non-trivial optimization problem, as complex dependencies exist between the wind turbines. State-of-the-art wind farm control typically relies on physics-based heuristics that fail to capture the full ","authors_text":"Diederik M. Roijers, Eugenio Bargiacchi, Jan Helsen, Pieter-Jan Daems, Pieter J.K. Libin, Timothy Verstraeten","cross_cats":["cs.AI","cs.SY","eess.SY"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2021-01-19T20:12:30Z","title":"Scalable Optimization for Wind Farm Control using Coordination Graphs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.07844","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":"sha256:887adfd23db9b11d2935596fb44f65478e21022227bddfe36bc1199b1e161498","target":"record","created_at":"2026-07-05T02:08:22Z","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":"c81a5056cdf8bd9441e4970505252764bafcc0fd7680ec0dbbae921d0cf96128","cross_cats_sorted":["cs.AI","cs.SY","eess.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2021-01-19T20:12:30Z","title_canon_sha256":"ac87bcbca7ac901e2aec54adf49da4b237a52b725be3d0fc8fa50bcb19f0a2da"},"schema_version":"1.0","source":{"id":"2101.07844","kind":"arxiv","version":1}},"canonical_sha256":"78017dd7e921ab3d30b534d753c471a957f3309dcd08d81d78909305dd9f80eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78017dd7e921ab3d30b534d753c471a957f3309dcd08d81d78909305dd9f80eb","first_computed_at":"2026-07-05T02:08:22.587370Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:08:22.587370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9hN8RD2jYMVt9vhU85VqlLARJ5zk94JZIZHW7cs4bUtOQrGX7TrWxpnALbc6v57hv6zEpg8k3kq96EgDuoFcAA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:08:22.587805Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.07844","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:887adfd23db9b11d2935596fb44f65478e21022227bddfe36bc1199b1e161498","sha256:b2c63f8e0b3648d6ad44f2b072697492b6f487b3dc261dff8f2c1a783f391a9a"],"state_sha256":"48844b2d1bb87ddeb04be9d4e70bd44545c1961173798366f4d8ec8d7fe03f00"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EJ1nZuZxF0YiUIspL3OMvDgPPeIADzGFv1vLbN0pmbel+9YKVZCOJL72I4lRAz806P9isewB3308uE6UP5KmBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T17:45:19.157455Z","bundle_sha256":"18e531e7c5fa395f8d7683f5fa1abd191841dae1261635eaa6443e41e269668c"}}