{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:YBPIXZEQ3OWWTCVTM2EAKKHUOL","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":"7e4f0a6caf277b2dc85467d4a8f90917a71cad189abc7904ddfafd1d8a23ec95","cross_cats_sorted":["cs.CC","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2014-02-17T23:42:50Z","title_canon_sha256":"04bb25a504efba0ad3f283b5a949fc5bc4d52aa2e2fa44cbf3d9a6387fa9393c"},"schema_version":"1.0","source":{"id":"1402.4183","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.4183","created_at":"2026-05-18T02:58:44Z"},{"alias_kind":"arxiv_version","alias_value":"1402.4183v1","created_at":"2026-05-18T02:58:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.4183","created_at":"2026-05-18T02:58:44Z"},{"alias_kind":"pith_short_12","alias_value":"YBPIXZEQ3OWW","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YBPIXZEQ3OWWTCVT","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YBPIXZEQ","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:17feebcab4a78f78127ae8edccdc25490b1dc60e7f57a5e97b9a22f04c245192","target":"graph","created_at":"2026-05-18T02:58:44Z","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":"This paper discusses the fixed-hub single allocation problem (FHSAP). In this problem, a network consists of hub nodes and terminal nodes. Hubs are fixed and fully connected; each terminal node is connected to a single hub which routes all its traffic. The goal is to minimize the cost of routing the traffic in the network. In this paper, we propose a linear programming (LP)-based rounding algorithm. The algorithm is based on two ideas. First, we modify the LP relaxation formulation introduced in Ernst and Krishnamoorthy (1996, 1999) by incorporating a set of validity constraints. Then, after o","authors_text":"Dongdong Ge, Jiawei Zhang, Lai Wei, Zizhuo Wang","cross_cats":["cs.CC","math.OC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2014-02-17T23:42:50Z","title":"An Improved Algorithm for Fixed-Hub Single Allocation Problem"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.4183","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:e665dc28bc01b68357e1986ad71e3a2299af23783df12e95c468e11caf4b8db3","target":"record","created_at":"2026-05-18T02:58:44Z","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":"7e4f0a6caf277b2dc85467d4a8f90917a71cad189abc7904ddfafd1d8a23ec95","cross_cats_sorted":["cs.CC","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DS","submitted_at":"2014-02-17T23:42:50Z","title_canon_sha256":"04bb25a504efba0ad3f283b5a949fc5bc4d52aa2e2fa44cbf3d9a6387fa9393c"},"schema_version":"1.0","source":{"id":"1402.4183","kind":"arxiv","version":1}},"canonical_sha256":"c05e8be490dbad698ab366880528f472ef9668e50fb81ee2257c9ce71c05c7be","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c05e8be490dbad698ab366880528f472ef9668e50fb81ee2257c9ce71c05c7be","first_computed_at":"2026-05-18T02:58:44.612663Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:58:44.612663Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wfXIdJlhbbL18kgRVguthBNmA6UxnNIz2ZR2FdUQp0fBrveDmw4o9lZgdskJUCUGSmog1Ob5fkHf45JOuCHRAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:58:44.613465Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.4183","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e665dc28bc01b68357e1986ad71e3a2299af23783df12e95c468e11caf4b8db3","sha256:17feebcab4a78f78127ae8edccdc25490b1dc60e7f57a5e97b9a22f04c245192"],"state_sha256":"32ca7c71abc59048c4e7107d96856321d8d57c332446ab62c1d775433dd92bc3"}