{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:OAVQEMDCI3J3XPZ7UEW2CM4KKC","short_pith_number":"pith:OAVQEMDC","canonical_record":{"source":{"id":"2208.03551","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2022-08-06T17:52:08Z","cross_cats_sorted":[],"title_canon_sha256":"6b7c59298b47011198bb060509e3e43d9706f027fbf7577a77031309c72b457e","abstract_canon_sha256":"819ea915d886927d31ce643967661a53d35f977d66ee0d13943d98e33b00b856"},"schema_version":"1.0"},"canonical_sha256":"702b02306246d3bbbf3fa12da1338a50b5d57a71e703fc4cf17a0270ab26a606","source":{"kind":"arxiv","id":"2208.03551","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.03551","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"arxiv_version","alias_value":"2208.03551v1","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.03551","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"pith_short_12","alias_value":"OAVQEMDCI3J3","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"pith_short_16","alias_value":"OAVQEMDCI3J3XPZ7","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"pith_short_8","alias_value":"OAVQEMDC","created_at":"2026-07-05T04:46:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:OAVQEMDCI3J3XPZ7UEW2CM4KKC","target":"record","payload":{"canonical_record":{"source":{"id":"2208.03551","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2022-08-06T17:52:08Z","cross_cats_sorted":[],"title_canon_sha256":"6b7c59298b47011198bb060509e3e43d9706f027fbf7577a77031309c72b457e","abstract_canon_sha256":"819ea915d886927d31ce643967661a53d35f977d66ee0d13943d98e33b00b856"},"schema_version":"1.0"},"canonical_sha256":"702b02306246d3bbbf3fa12da1338a50b5d57a71e703fc4cf17a0270ab26a606","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:46:41.929171Z","signature_b64":"ep/Y+zyW/ulpU0EYuKPkpAv+hYXT84X57yDo2aEPof/SOOCPk82817/kYt7shqieXKBp+3vIZhUSWpQOl7BCCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"702b02306246d3bbbf3fa12da1338a50b5d57a71e703fc4cf17a0270ab26a606","last_reissued_at":"2026-07-05T04:46:41.928727Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:46:41.928727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2208.03551","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":"2026-07-05T04:46:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kyRldc86qaX4so54I+1pabUZ4XcNQjSfpYXDPUxIjUTPWMYTG/2R4WRo00AFhG96/rMK49bFBEDSNEp7DnKMCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T23:08:10.935328Z"},"content_sha256":"308a4449b86d9291de9dd2d657612802e7ce6b42dcd32e19e0f6ac23a0e28edf","schema_version":"1.0","event_id":"sha256:308a4449b86d9291de9dd2d657612802e7ce6b42dcd32e19e0f6ac23a0e28edf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:OAVQEMDCI3J3XPZ7UEW2CM4KKC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polyhedral Relaxations for Optimal Pump Scheduling of Potable Water Distribution Networks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.OC","authors_text":"Ahmed S. Zamzam, Byron Tasseff, Carleton Coffrin, Clayton Barrows, Devon Sigler, Jonathan Stickel, Pascal Van Hentenryck, Russell Bent, Yang Liu","submitted_at":"2022-08-06T17:52:08Z","abstract_excerpt":"The classic pump scheduling or Optimal Water Flow (OWF) problem for water distribution networks (WDNs) minimizes the cost of power consumption for a given WDN over a fixed time horizon. In its exact form, the OWF is a computationally challenging mixed-integer nonlinear program (MINLP). It is complicated by nonlinear equality constraints that model network physics, discrete variables that model operational controls, and intertemporal constraints that model changes to storage devices. To address the computational challenges of the OWF, this paper develops tight polyhedral relaxations of the orig"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.03551","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/2208.03551/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":"2026-07-05T04:46:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MFT5YiM4yl7qKb87jCRVTVpf6aXAXaEM+MWJ+jzE+Eu8sgqnwtEkjixphVqdoc8BniMC7LYBUps/fd4V7091Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T23:08:10.936306Z"},"content_sha256":"2381c91281cfffb5aeada30e086e54e5adbfd3b6534bceef839ed0a1295bfaa0","schema_version":"1.0","event_id":"sha256:2381c91281cfffb5aeada30e086e54e5adbfd3b6534bceef839ed0a1295bfaa0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OAVQEMDCI3J3XPZ7UEW2CM4KKC/bundle.json","state_url":"https://pith.science/pith/OAVQEMDCI3J3XPZ7UEW2CM4KKC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OAVQEMDCI3J3XPZ7UEW2CM4KKC/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":"2026-08-10T23:08:10Z","links":{"resolver":"https://pith.science/pith/OAVQEMDCI3J3XPZ7UEW2CM4KKC","bundle":"https://pith.science/pith/OAVQEMDCI3J3XPZ7UEW2CM4KKC/bundle.json","state":"https://pith.science/pith/OAVQEMDCI3J3XPZ7UEW2CM4KKC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OAVQEMDCI3J3XPZ7UEW2CM4KKC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:OAVQEMDCI3J3XPZ7UEW2CM4KKC","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":"819ea915d886927d31ce643967661a53d35f977d66ee0d13943d98e33b00b856","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2022-08-06T17:52:08Z","title_canon_sha256":"6b7c59298b47011198bb060509e3e43d9706f027fbf7577a77031309c72b457e"},"schema_version":"1.0","source":{"id":"2208.03551","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.03551","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"arxiv_version","alias_value":"2208.03551v1","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.03551","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"pith_short_12","alias_value":"OAVQEMDCI3J3","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"pith_short_16","alias_value":"OAVQEMDCI3J3XPZ7","created_at":"2026-07-05T04:46:41Z"},{"alias_kind":"pith_short_8","alias_value":"OAVQEMDC","created_at":"2026-07-05T04:46:41Z"}],"graph_snapshots":[{"event_id":"sha256:2381c91281cfffb5aeada30e086e54e5adbfd3b6534bceef839ed0a1295bfaa0","target":"graph","created_at":"2026-07-05T04:46:41Z","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/2208.03551/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The classic pump scheduling or Optimal Water Flow (OWF) problem for water distribution networks (WDNs) minimizes the cost of power consumption for a given WDN over a fixed time horizon. In its exact form, the OWF is a computationally challenging mixed-integer nonlinear program (MINLP). It is complicated by nonlinear equality constraints that model network physics, discrete variables that model operational controls, and intertemporal constraints that model changes to storage devices. To address the computational challenges of the OWF, this paper develops tight polyhedral relaxations of the orig","authors_text":"Ahmed S. Zamzam, Byron Tasseff, Carleton Coffrin, Clayton Barrows, Devon Sigler, Jonathan Stickel, Pascal Van Hentenryck, Russell Bent, Yang Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2022-08-06T17:52:08Z","title":"Polyhedral Relaxations for Optimal Pump Scheduling of Potable Water Distribution Networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.03551","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":"sha256:308a4449b86d9291de9dd2d657612802e7ce6b42dcd32e19e0f6ac23a0e28edf","target":"record","created_at":"2026-07-05T04:46:41Z","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":"819ea915d886927d31ce643967661a53d35f977d66ee0d13943d98e33b00b856","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2022-08-06T17:52:08Z","title_canon_sha256":"6b7c59298b47011198bb060509e3e43d9706f027fbf7577a77031309c72b457e"},"schema_version":"1.0","source":{"id":"2208.03551","kind":"arxiv","version":1}},"canonical_sha256":"702b02306246d3bbbf3fa12da1338a50b5d57a71e703fc4cf17a0270ab26a606","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"702b02306246d3bbbf3fa12da1338a50b5d57a71e703fc4cf17a0270ab26a606","first_computed_at":"2026-07-05T04:46:41.928727Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:46:41.928727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ep/Y+zyW/ulpU0EYuKPkpAv+hYXT84X57yDo2aEPof/SOOCPk82817/kYt7shqieXKBp+3vIZhUSWpQOl7BCCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:46:41.929171Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.03551","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:308a4449b86d9291de9dd2d657612802e7ce6b42dcd32e19e0f6ac23a0e28edf","sha256:2381c91281cfffb5aeada30e086e54e5adbfd3b6534bceef839ed0a1295bfaa0"],"state_sha256":"01f3caba7c9ff896e3dd300eab04825972a5aa5c30d9cdd88ec764d7063ed147"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Dni8hdpRsGwbhfANo+SV9w+Qec6xYykXviTZeORl08l4kP1DUDxqeguVBifjiXEiKd2PdVlXdjMg/PwrwQrAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T23:08:10.941440Z","bundle_sha256":"886748a1764973463f51877975b0f788a0a5a0e68c42c59d173b09f0b3c71ee2"}}