{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:E5ZTK36CMDSRAHNOHI4KM5R3AI","short_pith_number":"pith:E5ZTK36C","canonical_record":{"source":{"id":"2309.05379","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2023-09-11T11:02:00Z","cross_cats_sorted":[],"title_canon_sha256":"ce50ec49f403365bbc15154a823c2dbf226e872d138cfa2c8e47a60de8c9527a","abstract_canon_sha256":"1a04116d551d536dffe0f7c355dcb19bef9005226c9073835ee8bf43b11f1911"},"schema_version":"1.0"},"canonical_sha256":"2773356fc260e5101dae3a38a6763b021f3de7ab4271e9a6858fb0025025d9f6","source":{"kind":"arxiv","id":"2309.05379","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.05379","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"arxiv_version","alias_value":"2309.05379v3","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.05379","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"pith_short_12","alias_value":"E5ZTK36CMDSR","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"pith_short_16","alias_value":"E5ZTK36CMDSRAHNO","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"pith_short_8","alias_value":"E5ZTK36C","created_at":"2026-07-05T07:24:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:E5ZTK36CMDSRAHNOHI4KM5R3AI","target":"record","payload":{"canonical_record":{"source":{"id":"2309.05379","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2023-09-11T11:02:00Z","cross_cats_sorted":[],"title_canon_sha256":"ce50ec49f403365bbc15154a823c2dbf226e872d138cfa2c8e47a60de8c9527a","abstract_canon_sha256":"1a04116d551d536dffe0f7c355dcb19bef9005226c9073835ee8bf43b11f1911"},"schema_version":"1.0"},"canonical_sha256":"2773356fc260e5101dae3a38a6763b021f3de7ab4271e9a6858fb0025025d9f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:24:53.665853Z","signature_b64":"4DxJ52t9HlNHVvYXxOOhvL7KcxPX2n9T1gtgTIxiK1HNRBNSOSUrLkqCDda71GCbFKYGE5ZgMM6nqinPS7pzDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2773356fc260e5101dae3a38a6763b021f3de7ab4271e9a6858fb0025025d9f6","last_reissued_at":"2026-07-05T07:24:53.665269Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:24:53.665269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2309.05379","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:24:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Xa7s+sm2KwFKVnhM5p5vBOppsM1tfRapuZR/CmY+la2p6qwI4Xc+W2ZA6hXNaPwjGf2QMUl39ucZb9ZcdpIDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:02:34.361066Z"},"content_sha256":"0c110aaf41be5bbb3bd4c84754245b723789634fb0dd4e49edee76adbb01a22b","schema_version":"1.0","event_id":"sha256:0c110aaf41be5bbb3bd4c84754245b723789634fb0dd4e49edee76adbb01a22b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:E5ZTK36CMDSRAHNOHI4KM5R3AI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On Truthful Constrained Heterogeneous Facility Location with Max-Variant Cost","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.GT","authors_text":"Alexandros A. Voudouris, Mohammad Lotfi","submitted_at":"2023-09-11T11:02:00Z","abstract_excerpt":"We consider a problem where agents have private positions on a line, and public approval preferences over two facilities, and their cost is the maximum distance from their approved facilities. The goal is to decide the facility locations to minimize the total and the max cost, while incentivizing the agents to be truthful. We design a strategyproof mechanism that is simultaneously $11$- and $5$-approximate for these two objective functions, thus improving the previously best-known bounds of $2n+1$ and $9$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.05379","kind":"arxiv","version":3},"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/2309.05379/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":"2026-07-05T07:24:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g3IYHFswT8DlFJ8VWVeeT1nQdCCah5j0NWUMLFfxW0llDC9I6milmSXSXpmDtw8CIpwoDuacHyfD2c2kTERfDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:02:34.361479Z"},"content_sha256":"deab82ad466009dba0dfbe5c86c7069a5b881ff655b18fb5f45b896604d3dc81","schema_version":"1.0","event_id":"sha256:deab82ad466009dba0dfbe5c86c7069a5b881ff655b18fb5f45b896604d3dc81"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E5ZTK36CMDSRAHNOHI4KM5R3AI/bundle.json","state_url":"https://pith.science/pith/E5ZTK36CMDSRAHNOHI4KM5R3AI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E5ZTK36CMDSRAHNOHI4KM5R3AI/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":"2026-08-01T12:02:34Z","links":{"resolver":"https://pith.science/pith/E5ZTK36CMDSRAHNOHI4KM5R3AI","bundle":"https://pith.science/pith/E5ZTK36CMDSRAHNOHI4KM5R3AI/bundle.json","state":"https://pith.science/pith/E5ZTK36CMDSRAHNOHI4KM5R3AI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E5ZTK36CMDSRAHNOHI4KM5R3AI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:E5ZTK36CMDSRAHNOHI4KM5R3AI","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":"1a04116d551d536dffe0f7c355dcb19bef9005226c9073835ee8bf43b11f1911","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2023-09-11T11:02:00Z","title_canon_sha256":"ce50ec49f403365bbc15154a823c2dbf226e872d138cfa2c8e47a60de8c9527a"},"schema_version":"1.0","source":{"id":"2309.05379","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.05379","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"arxiv_version","alias_value":"2309.05379v3","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.05379","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"pith_short_12","alias_value":"E5ZTK36CMDSR","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"pith_short_16","alias_value":"E5ZTK36CMDSRAHNO","created_at":"2026-07-05T07:24:53Z"},{"alias_kind":"pith_short_8","alias_value":"E5ZTK36C","created_at":"2026-07-05T07:24:53Z"}],"graph_snapshots":[{"event_id":"sha256:deab82ad466009dba0dfbe5c86c7069a5b881ff655b18fb5f45b896604d3dc81","target":"graph","created_at":"2026-07-05T07:24:53Z","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/2309.05379/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We consider a problem where agents have private positions on a line, and public approval preferences over two facilities, and their cost is the maximum distance from their approved facilities. The goal is to decide the facility locations to minimize the total and the max cost, while incentivizing the agents to be truthful. We design a strategyproof mechanism that is simultaneously $11$- and $5$-approximate for these two objective functions, thus improving the previously best-known bounds of $2n+1$ and $9$.","authors_text":"Alexandros A. Voudouris, Mohammad Lotfi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2023-09-11T11:02:00Z","title":"On Truthful Constrained Heterogeneous Facility Location with Max-Variant Cost"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.05379","kind":"arxiv","version":3},"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":"sha256:0c110aaf41be5bbb3bd4c84754245b723789634fb0dd4e49edee76adbb01a22b","target":"record","created_at":"2026-07-05T07:24:53Z","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":"1a04116d551d536dffe0f7c355dcb19bef9005226c9073835ee8bf43b11f1911","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2023-09-11T11:02:00Z","title_canon_sha256":"ce50ec49f403365bbc15154a823c2dbf226e872d138cfa2c8e47a60de8c9527a"},"schema_version":"1.0","source":{"id":"2309.05379","kind":"arxiv","version":3}},"canonical_sha256":"2773356fc260e5101dae3a38a6763b021f3de7ab4271e9a6858fb0025025d9f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2773356fc260e5101dae3a38a6763b021f3de7ab4271e9a6858fb0025025d9f6","first_computed_at":"2026-07-05T07:24:53.665269Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:24:53.665269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4DxJ52t9HlNHVvYXxOOhvL7KcxPX2n9T1gtgTIxiK1HNRBNSOSUrLkqCDda71GCbFKYGE5ZgMM6nqinPS7pzDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T07:24:53.665853Z","signed_message":"canonical_sha256_bytes"},"source_id":"2309.05379","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c110aaf41be5bbb3bd4c84754245b723789634fb0dd4e49edee76adbb01a22b","sha256:deab82ad466009dba0dfbe5c86c7069a5b881ff655b18fb5f45b896604d3dc81"],"state_sha256":"a32e68054149706ef72d39eed822e52647b0e787d796d5cd1c14aefa87ed116c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8WgiVwQ6H5OUiTmfaXo/1O3Vl3zF7VK6mU4d8dDI5C/l3kR6oWzBnph11ieoHz8c3n2pMyvBR4z7P0Zmy5aeDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T12:02:34.364271Z","bundle_sha256":"a98b649a008ec663f99e6d3e6f666190e022e3c1c2c0aa752070f604ac76dd79"}}