{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:FHTO3KSC2JZHP57I4PPQQTCUWE","short_pith_number":"pith:FHTO3KSC","canonical_record":{"source":{"id":"1312.3971","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-12-13T22:10:54Z","cross_cats_sorted":[],"title_canon_sha256":"a8898236da7ddc67fdca7dce024f33ca002e30a6b6ebe698dfd22e161f11d07c","abstract_canon_sha256":"0ebe04ba10037f31ca4ec8e99d1d271aff831d8770d818ec0c5169dbb523e543"},"schema_version":"1.0"},"canonical_sha256":"29e6edaa42d27277f7e8e3df084c54b13092fe38c1f5f6f602fff4a2d17d6cae","source":{"kind":"arxiv","id":"1312.3971","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.3971","created_at":"2026-05-18T03:04:36Z"},{"alias_kind":"arxiv_version","alias_value":"1312.3971v1","created_at":"2026-05-18T03:04:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.3971","created_at":"2026-05-18T03:04:36Z"},{"alias_kind":"pith_short_12","alias_value":"FHTO3KSC2JZH","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FHTO3KSC2JZHP57I","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FHTO3KSC","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:FHTO3KSC2JZHP57I4PPQQTCUWE","target":"record","payload":{"canonical_record":{"source":{"id":"1312.3971","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-12-13T22:10:54Z","cross_cats_sorted":[],"title_canon_sha256":"a8898236da7ddc67fdca7dce024f33ca002e30a6b6ebe698dfd22e161f11d07c","abstract_canon_sha256":"0ebe04ba10037f31ca4ec8e99d1d271aff831d8770d818ec0c5169dbb523e543"},"schema_version":"1.0"},"canonical_sha256":"29e6edaa42d27277f7e8e3df084c54b13092fe38c1f5f6f602fff4a2d17d6cae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:04:36.438565Z","signature_b64":"XhrpIxNmQGY+IPi29hymQ0jFrp7lx7Ev9JwcnrHkU9h77iaAiPIcF+x+MD/3JvTyIFMkT7N1J1/Hk2+ywogXBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"29e6edaa42d27277f7e8e3df084c54b13092fe38c1f5f6f602fff4a2d17d6cae","last_reissued_at":"2026-05-18T03:04:36.437668Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:04:36.437668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.3971","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":"2026-05-18T03:04:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DT8ovqDlkmqpOhtS9ZuCO1vi0TGmFNykDjY3ln9B8jG96Tdgw1FM66RsdHuf0gSq4e8Y79g5HqouJvrOozwlDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T23:13:53.905467Z"},"content_sha256":"614974ccce5e5e219ac298832b69f4811b045ea9ab03d0cee3669e9c6b4c239f","schema_version":"1.0","event_id":"sha256:614974ccce5e5e219ac298832b69f4811b045ea9ab03d0cee3669e9c6b4c239f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:FHTO3KSC2JZHP57I4PPQQTCUWE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Balancing bike sharing systems (BBSS): instance generation from the CitiBike NYC data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AI","authors_text":"Tommaso Urli","submitted_at":"2013-12-13T22:10:54Z","abstract_excerpt":"Bike sharing systems are a very popular means to provide bikes to citizens in a simple and cheap way. The idea is to install bike stations at various points in the city, from which a registered user can easily loan a bike by removing it from a specialized rack. After the ride, the user may return the bike at any station (if there is a free rack). Services of this kind are mainly public or semi-public, often aimed at increasing the attractiveness of non-motorized means of transportation, and are usually free, or almost free, of charge for the users. Depending on their location, bike stations ha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3971","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":"2026-05-18T03:04:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VxIvFm8pgvap24C7SkG74je09PJVr+nw6P12h2Yt4bl2jvk5zX6e0uOwBpPQNBLkLE3dXx4DSGHWjVMYGP5kDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T23:13:53.905814Z"},"content_sha256":"bb9b7967d0710b9e26d137441f3d7a9f7829e805023443059bfcf14c350148ac","schema_version":"1.0","event_id":"sha256:bb9b7967d0710b9e26d137441f3d7a9f7829e805023443059bfcf14c350148ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FHTO3KSC2JZHP57I4PPQQTCUWE/bundle.json","state_url":"https://pith.science/pith/FHTO3KSC2JZHP57I4PPQQTCUWE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FHTO3KSC2JZHP57I4PPQQTCUWE/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":"2026-06-28T23:13:53Z","links":{"resolver":"https://pith.science/pith/FHTO3KSC2JZHP57I4PPQQTCUWE","bundle":"https://pith.science/pith/FHTO3KSC2JZHP57I4PPQQTCUWE/bundle.json","state":"https://pith.science/pith/FHTO3KSC2JZHP57I4PPQQTCUWE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FHTO3KSC2JZHP57I4PPQQTCUWE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FHTO3KSC2JZHP57I4PPQQTCUWE","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":"0ebe04ba10037f31ca4ec8e99d1d271aff831d8770d818ec0c5169dbb523e543","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-12-13T22:10:54Z","title_canon_sha256":"a8898236da7ddc67fdca7dce024f33ca002e30a6b6ebe698dfd22e161f11d07c"},"schema_version":"1.0","source":{"id":"1312.3971","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.3971","created_at":"2026-05-18T03:04:36Z"},{"alias_kind":"arxiv_version","alias_value":"1312.3971v1","created_at":"2026-05-18T03:04:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.3971","created_at":"2026-05-18T03:04:36Z"},{"alias_kind":"pith_short_12","alias_value":"FHTO3KSC2JZH","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FHTO3KSC2JZHP57I","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FHTO3KSC","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:bb9b7967d0710b9e26d137441f3d7a9f7829e805023443059bfcf14c350148ac","target":"graph","created_at":"2026-05-18T03:04:36Z","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":"Bike sharing systems are a very popular means to provide bikes to citizens in a simple and cheap way. The idea is to install bike stations at various points in the city, from which a registered user can easily loan a bike by removing it from a specialized rack. After the ride, the user may return the bike at any station (if there is a free rack). Services of this kind are mainly public or semi-public, often aimed at increasing the attractiveness of non-motorized means of transportation, and are usually free, or almost free, of charge for the users. Depending on their location, bike stations ha","authors_text":"Tommaso Urli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-12-13T22:10:54Z","title":"Balancing bike sharing systems (BBSS): instance generation from the CitiBike NYC data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3971","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":"sha256:614974ccce5e5e219ac298832b69f4811b045ea9ab03d0cee3669e9c6b4c239f","target":"record","created_at":"2026-05-18T03:04:36Z","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":"0ebe04ba10037f31ca4ec8e99d1d271aff831d8770d818ec0c5169dbb523e543","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-12-13T22:10:54Z","title_canon_sha256":"a8898236da7ddc67fdca7dce024f33ca002e30a6b6ebe698dfd22e161f11d07c"},"schema_version":"1.0","source":{"id":"1312.3971","kind":"arxiv","version":1}},"canonical_sha256":"29e6edaa42d27277f7e8e3df084c54b13092fe38c1f5f6f602fff4a2d17d6cae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"29e6edaa42d27277f7e8e3df084c54b13092fe38c1f5f6f602fff4a2d17d6cae","first_computed_at":"2026-05-18T03:04:36.437668Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:04:36.437668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XhrpIxNmQGY+IPi29hymQ0jFrp7lx7Ev9JwcnrHkU9h77iaAiPIcF+x+MD/3JvTyIFMkT7N1J1/Hk2+ywogXBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:04:36.438565Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.3971","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:614974ccce5e5e219ac298832b69f4811b045ea9ab03d0cee3669e9c6b4c239f","sha256:bb9b7967d0710b9e26d137441f3d7a9f7829e805023443059bfcf14c350148ac"],"state_sha256":"59f88b4d9fe4baefdc1e84a168f4129416cc524fabe3856b9c53d05021b97f70"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cvhm9SRo6+nY9R+OZwv/NiyfEttUXqo/+xeRuEHNegbHmbE+DydIiSAafswo0n1hWk1mpOKRG9XHLt74/4SUCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T23:13:53.907690Z","bundle_sha256":"88fac0b713003b3d8686b6a568b936b678e070dcba8085bb2a98a30d66c1404e"}}