{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:HR476T2G2ZUTAGMGBB72U3E2A7","short_pith_number":"pith:HR476T2G","canonical_record":{"source":{"id":"2006.05688","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2020-06-10T07:03:48Z","cross_cats_sorted":["math.OC"],"title_canon_sha256":"6f2b5de1772c9e126eea71b0c1fbb97f84347c13003e26ba893ac80610d951ef","abstract_canon_sha256":"a9bf86218980261244cff7abe769aebf39a384a0696a5ee30e6471ab9690dfbe"},"schema_version":"1.0"},"canonical_sha256":"3c79ff4f46d669301986087faa6c9a07f47b7e6d7abfedc735516c701943d697","source":{"kind":"arxiv","id":"2006.05688","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.05688","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"arxiv_version","alias_value":"2006.05688v1","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.05688","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"pith_short_12","alias_value":"HR476T2G2ZUT","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"pith_short_16","alias_value":"HR476T2G2ZUTAGMG","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"pith_short_8","alias_value":"HR476T2G","created_at":"2026-07-05T01:09:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:HR476T2G2ZUTAGMGBB72U3E2A7","target":"record","payload":{"canonical_record":{"source":{"id":"2006.05688","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2020-06-10T07:03:48Z","cross_cats_sorted":["math.OC"],"title_canon_sha256":"6f2b5de1772c9e126eea71b0c1fbb97f84347c13003e26ba893ac80610d951ef","abstract_canon_sha256":"a9bf86218980261244cff7abe769aebf39a384a0696a5ee30e6471ab9690dfbe"},"schema_version":"1.0"},"canonical_sha256":"3c79ff4f46d669301986087faa6c9a07f47b7e6d7abfedc735516c701943d697","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:09:15.868082Z","signature_b64":"KKvxJ+oAKJ3BI52in2FvQ3IkeDrnSbcLGARNi7nyZINsHd803IHuX/f5W9nhzBiDhLDFAI2Wd9iPeWN6nfxjDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c79ff4f46d669301986087faa6c9a07f47b7e6d7abfedc735516c701943d697","last_reissued_at":"2026-07-05T01:09:15.867729Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:09:15.867729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.05688","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":"2026-07-05T01:09:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SkMivvX9nulHVjsi4fWTlenJhGJw8LFHdXyiqS/YoB2BAY5QW4yz20b036fHe52c511fiX4oALs0/H6xmLIAAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T01:30:00.187144Z"},"content_sha256":"57cb9ff5d7fda81231a1a1cb6005ed3c1cde241cd8f74a332a981cccc51ee7cc","schema_version":"1.0","event_id":"sha256:57cb9ff5d7fda81231a1a1cb6005ed3c1cde241cd8f74a332a981cccc51ee7cc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:HR476T2G2ZUTAGMGBB72U3E2A7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal frequency setting of metro services in the age of COVID-19 distancing measures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.OC"],"primary_cat":"physics.soc-ph","authors_text":"Konstantinos Gkiotsalitis, Oded Cats","submitted_at":"2020-06-10T07:03:48Z","abstract_excerpt":"Public transport is one of the most disrupted sectors of the COVID-19 pandemic with reported ridership drops up to 90% in majorly affected countries. As many government authorities strive to partially resume activities, public transport operators are in an urgent need for models that can evaluate the impact of different social distancing policies on operational and passenger-related costs. In this study, we introduce a mixed-integer quadratic programming model for the redesign of public transport services considering the operational, passenger, and revenue loss-related costs by evaluating the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.05688","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/2006.05688/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":"2026-07-05T01:09:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9twJF6UT2TcEzDruA23Z/a7RGSpyirZzGWyhk1eV0GG6ulrCmXqOo9iPl+r/zy7dp4KYDrPXHV2pt2lNdb3HCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T01:30:00.187714Z"},"content_sha256":"75c8ce8528f54d553e332e1ee3e5f89c30996485ee2e335d367359509652b9bc","schema_version":"1.0","event_id":"sha256:75c8ce8528f54d553e332e1ee3e5f89c30996485ee2e335d367359509652b9bc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HR476T2G2ZUTAGMGBB72U3E2A7/bundle.json","state_url":"https://pith.science/pith/HR476T2G2ZUTAGMGBB72U3E2A7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HR476T2G2ZUTAGMGBB72U3E2A7/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":"2026-08-07T01:30:00Z","links":{"resolver":"https://pith.science/pith/HR476T2G2ZUTAGMGBB72U3E2A7","bundle":"https://pith.science/pith/HR476T2G2ZUTAGMGBB72U3E2A7/bundle.json","state":"https://pith.science/pith/HR476T2G2ZUTAGMGBB72U3E2A7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HR476T2G2ZUTAGMGBB72U3E2A7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:HR476T2G2ZUTAGMGBB72U3E2A7","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":"a9bf86218980261244cff7abe769aebf39a384a0696a5ee30e6471ab9690dfbe","cross_cats_sorted":["math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2020-06-10T07:03:48Z","title_canon_sha256":"6f2b5de1772c9e126eea71b0c1fbb97f84347c13003e26ba893ac80610d951ef"},"schema_version":"1.0","source":{"id":"2006.05688","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.05688","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"arxiv_version","alias_value":"2006.05688v1","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.05688","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"pith_short_12","alias_value":"HR476T2G2ZUT","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"pith_short_16","alias_value":"HR476T2G2ZUTAGMG","created_at":"2026-07-05T01:09:15Z"},{"alias_kind":"pith_short_8","alias_value":"HR476T2G","created_at":"2026-07-05T01:09:15Z"}],"graph_snapshots":[{"event_id":"sha256:75c8ce8528f54d553e332e1ee3e5f89c30996485ee2e335d367359509652b9bc","target":"graph","created_at":"2026-07-05T01:09:15Z","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/2006.05688/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Public transport is one of the most disrupted sectors of the COVID-19 pandemic with reported ridership drops up to 90% in majorly affected countries. As many government authorities strive to partially resume activities, public transport operators are in an urgent need for models that can evaluate the impact of different social distancing policies on operational and passenger-related costs. In this study, we introduce a mixed-integer quadratic programming model for the redesign of public transport services considering the operational, passenger, and revenue loss-related costs by evaluating the ","authors_text":"Konstantinos Gkiotsalitis, Oded Cats","cross_cats":["math.OC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2020-06-10T07:03:48Z","title":"Optimal frequency setting of metro services in the age of COVID-19 distancing measures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.05688","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":"sha256:57cb9ff5d7fda81231a1a1cb6005ed3c1cde241cd8f74a332a981cccc51ee7cc","target":"record","created_at":"2026-07-05T01:09:15Z","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":"a9bf86218980261244cff7abe769aebf39a384a0696a5ee30e6471ab9690dfbe","cross_cats_sorted":["math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2020-06-10T07:03:48Z","title_canon_sha256":"6f2b5de1772c9e126eea71b0c1fbb97f84347c13003e26ba893ac80610d951ef"},"schema_version":"1.0","source":{"id":"2006.05688","kind":"arxiv","version":1}},"canonical_sha256":"3c79ff4f46d669301986087faa6c9a07f47b7e6d7abfedc735516c701943d697","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c79ff4f46d669301986087faa6c9a07f47b7e6d7abfedc735516c701943d697","first_computed_at":"2026-07-05T01:09:15.867729Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:09:15.867729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KKvxJ+oAKJ3BI52in2FvQ3IkeDrnSbcLGARNi7nyZINsHd803IHuX/f5W9nhzBiDhLDFAI2Wd9iPeWN6nfxjDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:09:15.868082Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.05688","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57cb9ff5d7fda81231a1a1cb6005ed3c1cde241cd8f74a332a981cccc51ee7cc","sha256:75c8ce8528f54d553e332e1ee3e5f89c30996485ee2e335d367359509652b9bc"],"state_sha256":"c6731725b58fae4149dc1713d67eaccb5058633c0e2debf541f51f32351884de"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QwUMR/V3qGjM4brThIvEQyTmo9/EcPJg6GuCrioeIlkR7aTpOn/ZC4n3RfYu4AFXbcbKvgq4BA793l6omfhcAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T01:30:00.193685Z","bundle_sha256":"cd50e6d516279f6838603d403f502307424ee0c689307b2ae514d9107059e272"}}